18477159816 has 64 divisors (see below), whose sum is σ = 46773288000. Its totient is φ = 6082151168.

The previous prime is 18477159809. The next prime is 18477159817. The reversal of 18477159816 is 61895177481.

It is not an unprimeable number, because it can be changed into a prime (18477159817) 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, 603715 + ... + 633581.

It is an arithmetic number, because the mean of its divisors is an integer number (730832625).

Almost surely, 2^18477159816 is an apocalyptic number.

It is an amenable number.

18477159816 is an abundant number, since it is smaller than the sum of its proper divisors (28296128184).

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

18477159816 is a wasteful number, since it uses less digits than its factorization.

18477159816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30198 (or 30194 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 57.

The spelling of 18477159816 in words is "eighteen billion, four hundred seventy-seven million, one hundred fifty-nine thousand, eight hundred sixteen".