18836460477 has 12 divisors (see below), whose sum is σ = 27235092924. Its totient is φ = 12545237760.

The previous prime is 18836460469. The next prime is 18836460527. The reversal of 18836460477 is 77406463881.

18836460477 is a `hidden beast` number, since 1 + 88 + 36 + 4 + 60 + 477 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 778744836 + 18057715641 = 27906^2 + 134379^2 .

It is not a de Polignac number, because 18836460477 - 2³ = 18836460469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18836460437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1023924 + ... + 1042157.

It is an arithmetic number, because the mean of its divisors is an integer number (2269591077).

Almost surely, 2^18836460477 is an apocalyptic number.

It is an amenable number.

18836460477 is a deficient number, since it is larger than the sum of its proper divisors (8398632447).

18836460477 is a wasteful number, since it uses less digits than its factorization.

18836460477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067100 (or 2067097 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 18836460477 in words is "eighteen billion, eight hundred thirty-six million, four hundred sixty thousand, four hundred seventy-seven".