18877693764 has 12 divisors (see below), whose sum is σ = 44047952144. Its totient is φ = 6292564584.

The previous prime is 18877693733. The next prime is 18877693799. The reversal of 18877693764 is 46739677881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 18877693695 and 18877693704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786570562 + ... + 786570585.

Almost surely, 2^18877693764 is an apocalyptic number.

It is an amenable number.

18877693764 is an abundant number, since it is smaller than the sum of its proper divisors (25170258380).

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

18877693764 is a wasteful number, since it uses less digits than its factorization.

18877693764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573141154 (or 1573141152 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 66.

The spelling of 18877693764 in words is "eighteen billion, eight hundred seventy-seven million, six hundred ninety-three thousand, seven hundred sixty-four".