18287801836 has 12 divisors (see below), whose sum is σ = 32006102128. Its totient is φ = 9143201232.

The previous prime is 18287801773. The next prime is 18287801843. The reversal of 18287801836 is 63810878281.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

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, 113736 + ... + 222511.

Almost surely, 2^18287801836 is an apocalyptic number.

It is an amenable number.

18287801836 is a deficient number, since it is larger than the sum of its proper divisors (13718300292).

18287801836 is a wasteful number, since it uses less digits than its factorization.

18287801836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349848 (or 349846 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 52.

The spelling of 18287801836 in words is "eighteen billion, two hundred eighty-seven million, eight hundred one thousand, eight hundred thirty-six".