18113732 has 36 divisors (see below), whose sum is σ = 39716460. Its totient is φ = 7164864.

The previous prime is 18113699. The next prime is 18113737. The reversal of 18113732 is 23731181.

It can be written as a sum of positive squares in 2 ways, for example, as 2637376 + 15476356 = 1624^2 + 3934^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (18113737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1007 + ... + 6102.

It is an arithmetic number, because the mean of its divisors is an integer number (1103235).

Almost surely, 2^18113732 is an apocalyptic number.

It is an amenable number.

18113732 is an abundant number, since it is smaller than the sum of its proper divisors (21602728).

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

18113732 is a wasteful number, since it uses less digits than its factorization.

18113732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140 (or 7131 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 18113732 is about 4256.0230262535. The cubic root of 18113732 is about 262.6249479237.

The spelling of 18113732 in words is "eighteen million, one hundred thirteen thousand, seven hundred thirty-two".