18236944 has 20 divisors (see below), whose sum is σ = 38546640. Its totient is φ = 8289440.

The previous prime is 18236927. The next prime is 18236947. The reversal of 18236944 is 44963281.

It is a super-2 number, since 2×18236944² = 665172252918272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18236947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51634 + ... + 51985.

It is an arithmetic number, because the mean of its divisors is an integer number (1927332).

Almost surely, 2^18236944 is an apocalyptic number.

It is an amenable number.

18236944 is an abundant number, since it is smaller than the sum of its proper divisors (20309696).

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

18236944 is a wasteful number, since it uses less digits than its factorization.

18236944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103638 (or 103632 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 18236944 is about 4270.4735100455. The cubic root of 18236944 is about 263.2190727210.

The spelling of 18236944 in words is "eighteen million, two hundred thirty-six thousand, nine hundred forty-four".