18013392 has 30 divisors (see below), whose sum is σ = 50412882. Its totient is φ = 6004416.

The previous prime is 18013381. The next prime is 18013409. The reversal of 18013392 is 29331081.

It can be written as a sum of positive squares in only one way, i.e., 17943696 + 69696 = 4236^2 + 264^2 .

It is a congruent number.

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, 62403 + ... + 62690.

Almost surely, 2^18013392 is an apocalyptic number.

18013392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18013392 is an abundant number, since it is smaller than the sum of its proper divisors (32399490).

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

18013392 is a wasteful number, since it uses less digits than its factorization.

18013392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125107 (or 125098 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18013392 is about 4244.2186560073. The cubic root of 18013392 is about 262.1391176955.

The spelling of 18013392 in words is "eighteen million, thirteen thousand, three hundred ninety-two".