18897477196 has 12 divisors (see below), whose sum is σ = 35614476352. Its totient is φ = 8721912528.

The previous prime is 18897477173. The next prime is 18897477217. The reversal of 18897477196 is 69177479881.

It is a super-2 number, since 2×18897477196² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181706460 + ... + 181706563.

Almost surely, 2^18897477196 is an apocalyptic number.

It is an amenable number.

18897477196 is a deficient number, since it is larger than the sum of its proper divisors (16716999156).

18897477196 is a wasteful number, since it uses less digits than its factorization.

18897477196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363413040 (or 363413038 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 67.

The spelling of 18897477196 in words is "eighteen billion, eight hundred ninety-seven million, four hundred seventy-seven thousand, one hundred ninety-six".