18113536 has 99 divisors (see below), whose sum is σ = 44454699. Its totient is φ = 7354368.

The previous prime is 18113521. The next prime is 18113569. The reversal of 18113536 is 63531181.

The square root of 18113536 is 4256.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (28).

Its product of digits (2160) is a multiple of the sum of its prime factors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 953335 + ... + 953353.

Almost surely, 2^18113536 is an apocalyptic number.

18113536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18113536 is the 4256-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18113536

18113536 is an abundant number, since it is smaller than the sum of its proper divisors (26341163).

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

18113536 is an equidigital number, since it uses as much as digits as its factorization.

18113536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 28 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The cubic root of 18113536 is about 262.6240006742.

The spelling of 18113536 in words is "eighteen million, one hundred thirteen thousand, five hundred thirty-six".