18859038072 has 48 divisors (see below), whose sum is σ = 54845165160. Its totient is φ = 5388296256.

The previous prime is 18859038019. The next prime is 18859038109. The reversal of 18859038072 is 27083095881.

It is a super-2 number, since 2×18859038072² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8017123 + ... + 8019474.

Almost surely, 2^18859038072 is an apocalyptic number.

18859038072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18859038072 is an abundant number, since it is smaller than the sum of its proper divisors (35986127088).

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

18859038072 is a wasteful number, since it uses less digits than its factorization.

18859038072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16036620 (or 16036609 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 18859038072 in words is "eighteen billion, eight hundred fifty-nine million, thirty-eight thousand, seventy-two".