18477101956 has 12 divisors (see below), whose sum is σ = 32346998992. Its totient is φ = 9235102248.

The previous prime is 18477101897. The next prime is 18477101959. The reversal of 18477101956 is 65910177481.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18477101959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850110 + ... + 871573.

Almost surely, 2^18477101956 is an apocalyptic number.

It is an amenable number.

18477101956 is a deficient number, since it is larger than the sum of its proper divisors (13869897036).

18477101956 is a wasteful number, since it uses less digits than its factorization.

18477101956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724370 (or 1724368 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 49.

The spelling of 18477101956 in words is "eighteen billion, four hundred seventy-seven million, one hundred one thousand, nine hundred fifty-six".