| Base | Representation |
|---|---|
| bin | 100100000101… |
| … | …1111111011000 |
| 3 | 1022121102010122 |
| 4 | 1020023333120 |
| 5 | 14321022410 |
| 6 | 1513332412 |
| 7 | 316563332 |
| oct | 110137730 |
| 9 | 38542118 |
| 10 | 18923480 |
| 11 | a755544 |
| 12 | 6407108 |
| 13 | 3bc7434 |
| 14 | 2728452 |
| 15 | 19dbe55 |
| hex | 120bfd8 |
18923480 has 64 divisors (see below), whose sum is σ = 45239040. Its totient is φ = 7108992.
The previous prime is 18923477. The next prime is 18923497. The reversal of 18923480 is 8432981.
It is a happy number.
It is a super-3 number, since 3×189234803 (a number of 23 digits) contains 333 as substring.
It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.
It is a nialpdrome in base 11.
It is a self number, because there is not a number n which added to its sum of digits gives 18923480.
It is a congruent number.
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 15 ways as a sum of consecutive naturals, for example, 61487 + ... + 61793.
It is an arithmetic number, because the mean of its divisors is an integer number (706860).
Almost surely, 218923480 is an apocalyptic number.
18923480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 18923480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22619520).
18923480 is an abundant number, since it is smaller than the sum of its proper divisors (26315560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18923480 is a wasteful number, since it uses less digits than its factorization.
18923480 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 408 (or 404 counting only the distinct ones).
The product of its (nonzero) digits is 13824, while the sum is 35.
The square root of 18923480 is about 4350.1126422197. The cubic root of 18923480 is about 266.4814616792.
The spelling of 18923480 in words is "eighteen million, nine hundred twenty-three thousand, four hundred eighty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.067 sec. • engine limits •