18686770565564 has 12 divisors (see below), whose sum is σ = 32702068614600. Its totient is φ = 9343322389968.

The previous prime is 18686770565503. The next prime is 18686770565629. The reversal of 18686770565564 is 46556507768681.

It is a junction number, because it is equal to n+sod(n) for n = 18686770565491 and 18686770565500.

It is a congruent number.

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, 15051494 + ... + 16245645.

It is an arithmetic number, because the mean of its divisors is an integer number (2725172384550).

Almost surely, 2^{18686770565564} is an apocalyptic number.

It is an amenable number.

18686770565564 is a deficient number, since it is larger than the sum of its proper divisors (14015298049036).

18686770565564 is a wasteful number, since it uses less digits than its factorization.

18686770565564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31446412 (or 31446410 counting only the distinct ones).

The product of its (nonzero) digits is 2032128000, while the sum is 74.

The spelling of 18686770565564 in words is "eighteen trillion, six hundred eighty-six billion, seven hundred seventy million, five hundred sixty-five thousand, five hundred sixty-four".