18972403677 has 12 divisors (see below), whose sum is σ = 27407221920. Its totient is φ = 12647051208.

The previous prime is 18972403657. The next prime is 18972403757. The reversal of 18972403677 is 77630427981.

It is not a de Polignac number, because 18972403677 - 2⁶ = 18972403613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18972403657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2808 + ... + 194814.

It is an arithmetic number, because the mean of its divisors is an integer number (2283935160).

Almost surely, 2^18972403677 is an apocalyptic number.

It is an amenable number.

18972403677 is a deficient number, since it is larger than the sum of its proper divisors (8434818243).

18972403677 is a wasteful number, since it uses less digits than its factorization.

18972403677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202992 (or 202989 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 18972403677 in words is "eighteen billion, nine hundred seventy-two million, four hundred three thousand, six hundred seventy-seven".