18786401695540 has 48 divisors (see below), whose sum is σ = 40123058088960. Its totient is φ = 7386652807040.

The previous prime is 18786401695511. The next prime is 18786401695571. The reversal of 18786401695540 is 4559610468781.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15683949 + ... + 16839211.

It is an arithmetic number, because the mean of its divisors is an integer number (835897043520).

Almost surely, 2^{18786401695540} is an apocalyptic number.

18786401695540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18786401695540 is an abundant number, since it is smaller than the sum of its proper divisors (21336656393420).

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

18786401695540 is a wasteful number, since it uses less digits than its factorization.

18786401695540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169112 (or 1169110 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 64.

The spelling of 18786401695540 in words is "eighteen trillion, seven hundred eighty-six billion, four hundred one million, six hundred ninety-five thousand, five hundred forty".