Base | Representation |
---|---|
bin | 11011111101010010… |
… | …111101001111110111 |
3 | 2212111002210222100210 |
4 | 123331102331033313 |
5 | 442434432041022 |
6 | 21442444040503 |
7 | 2111623523346 |
oct | 337522751767 |
9 | 85432728323 |
10 | 30019408887 |
11 | 118051a0236 |
12 | 5999533133 |
13 | 2aa53cc450 |
14 | 164ac5bb5d |
15 | baa6aea0c |
hex | 6fd4bd3f7 |
30019408887 has 16 divisors (see below), whose sum is σ = 43109660160. Its totient is φ = 18471396192.
The previous prime is 30019408879. The next prime is 30019408943. The reversal of 30019408887 is 78880491003.
It is not a de Polignac number, because 30019408887 - 23 = 30019408879 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30019408817) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351814 + ... + 428732.
It is an arithmetic number, because the mean of its divisors is an integer number (2694353760).
Almost surely, 230019408887 is an apocalyptic number.
30019408887 is a deficient number, since it is larger than the sum of its proper divisors (13090251273).
30019408887 is a wasteful number, since it uses less digits than its factorization.
30019408887 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 86942.
The product of its (nonzero) digits is 387072, while the sum is 48.
The spelling of 30019408887 in words is "thirty billion, nineteen million, four hundred eight thousand, eight hundred eighty-seven".
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