18836851356 has 72 divisors (see below), whose sum is σ = 48122887904. Its totient is φ = 6212142720.

The previous prime is 18836851333. The next prime is 18836851357. The reversal of 18836851356 is 65315863881.

18836851356 is a `hidden beast` number, since 18 + 8 + 3 + 68 + 513 + 56 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18836851357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5920086 + ... + 5923266.

Almost surely, 2^18836851356 is an apocalyptic number.

It is an amenable number.

18836851356 is an abundant number, since it is smaller than the sum of its proper divisors (29286036548).

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

18836851356 is a wasteful number, since it uses less digits than its factorization.

18836851356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4891 (or 4886 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 18836851356 in words is "eighteen billion, eight hundred thirty-six million, eight hundred fifty-one thousand, three hundred fifty-six".