18912802860 has 96 divisors (see below), whose sum is σ = 67245534720. Its totient is φ = 4322925504.

The previous prime is 18912802859. The next prime is 18912802913. The reversal of 18912802860 is 6820821981.

It is a happy number.

18912802860 is a `hidden beast` number, since 1 + 8 + 91 + 280 + 286 + 0 = 666.

It is a super-2 number, since 2×18912802860² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2497914 + ... + 2505473.

It is an arithmetic number, because the mean of its divisors is an integer number (700474320).

Almost surely, 2^18912802860 is an apocalyptic number.

18912802860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18912802860 is an abundant number, since it is smaller than the sum of its proper divisors (48332731860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18912802860 is a wasteful number, since it uses less digits than its factorization.

18912802860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003412 (or 5003404 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 18912802860 in words is "eighteen billion, nine hundred twelve million, eight hundred two thousand, eight hundred sixty".