18936512 has 56 divisors (see below), whose sum is σ = 43988736. Its totient is φ = 7918848.

The previous prime is 18936451. The next prime is 18936517. The reversal of 18936512 is 21563981.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×18936512² = 717182973452288, which contains 22 as substring.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (18936517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18773 + ... + 19755.

Almost surely, 2^18936512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18936512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21994368).

18936512 is an abundant number, since it is smaller than the sum of its proper divisors (25052224).

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

18936512 is an equidigital number, since it uses as much as digits as its factorization.

18936512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 1035 counting only the distinct ones).

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

The square root of 18936512 is about 4351.6102766677. The cubic root of 18936512 is about 266.5426200834.

The spelling of 18936512 in words is "eighteen million, nine hundred thirty-six thousand, five hundred twelve".