18870136 has 32 divisors (see below), whose sum is σ = 37908000. Its totient is φ = 8774656.

The previous prime is 18870109. The next prime is 18870149. The reversal of 18870136 is 63107881.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11325 + ... + 12883.

It is an arithmetic number, because the mean of its divisors is an integer number (1184625).

Almost surely, 2^18870136 is an apocalyptic number.

It is an amenable number.

18870136 is an abundant number, since it is smaller than the sum of its proper divisors (19037864).

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

18870136 is a wasteful number, since it uses less digits than its factorization.

18870136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 18870136 is about 4343.9769796812. The cubic root of 18870136 is about 266.2308283344.

The spelling of 18870136 in words is "eighteen million, eight hundred seventy thousand, one hundred thirty-six".