18512936 has 24 divisors (see below), whose sum is σ = 37590030. Its totient is φ = 8543808.

The previous prime is 18512891. The next prime is 18512941. The reversal of 18512936 is 63921581.

It can be written as a sum of positive squares in 3 ways, for example, as 15602500 + 2910436 = 3950^2 + 1706^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18512896 and 18512905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5495 + ... + 8198.

Almost surely, 2^18512936 is an apocalyptic number.

It is an amenable number.

18512936 is an abundant number, since it is smaller than the sum of its proper divisors (19077094).

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

18512936 is a wasteful number, since it uses less digits than its factorization.

18512936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13725 (or 13708 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 18512936 is about 4302.6661501911. Note that the first 3 decimals coincide. The cubic root of 18512936 is about 264.5402542355.

The spelling of 18512936 in words is "eighteen million, five hundred twelve thousand, nine hundred thirty-six".