18787088356 has 27 divisors (see below), whose sum is σ = 34708490019. Its totient is φ = 8896679928.

The previous prime is 18787088311. The next prime is 18787088363. The reversal of 18787088356 is 65388078781.

The square root of 18787088356 is 137066.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18787088294 and 18787088303.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5206705 + ... + 5210311.

Almost surely, 2^18787088356 is an apocalyptic number.

18787088356 is the 137066-th square number.

It is an amenable number.

18787088356 is a deficient number, since it is larger than the sum of its proper divisors (15921401663).

18787088356 is an frugal number, since it uses more digits than its factorization.

18787088356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7256 (or 3628 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 18787088356 in words is "eighteen billion, seven hundred eighty-seven million, eighty-eight thousand, three hundred fifty-six".