| Base | Representation |
|---|---|
| bin | 10001001111010110… |
| … | …110000100001000000 |
| 3 | 1202210002011011210100 |
| 4 | 101033112300201000 |
| 5 | 300402334011021 |
| 6 | 12300504002400 |
| 7 | 1223503621362 |
| oct | 211726604100 |
| 9 | 52702134710 |
| 10 | 18511235136 |
| 11 | 793a122a39 |
| 12 | 3707460400 |
| 13 | 199011a494 |
| 14 | c786a8d32 |
| 15 | 7351e0626 |
| hex | 44f5b0840 |
18511235136 has 63 divisors (see below), whose sum is σ = 53068474381. Its totient is φ = 6169323264.
The previous prime is 18511235063. The next prime is 18511235147. The reversal of 18511235136 is 63153211581.
It is a happy number.
The square root of 18511235136 is 136056.
It is a perfect power (a square), and thus also a powerful number.
18511235136 is a `hidden beast` number, since 1 + 8 + 511 + 2 + 3 + 5 + 136 = 666.
It can be written as a sum of positive squares in only one way, i.e., 4454761536 + 14056473600 = 66744^2 + 118560^2 .
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 18511235136.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3262510 + ... + 3268178.
Almost surely, 218511235136 is an apocalyptic number.
18511235136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
18511235136 is the 136056-th square number.
It is an amenable number.
18511235136 is an abundant number, since it is smaller than the sum of its proper divisors (34557239245).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18511235136 is an frugal number, since it uses more digits than its factorization.
18511235136 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11356 (or 5674 counting only the distinct ones).
The product of its digits is 21600, while the sum is 36.
Multiplying 18511235136 by its sum of digits (36), we get a square (666404464896 = 8163362).
18511235136 divided by its sum of digits (36) gives a square (514200976 = 226762).
The spelling of 18511235136 in words is "eighteen billion, five hundred eleven million, two hundred thirty-five thousand, one hundred thirty-six".
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