18634944 has 56 divisors (see below), whose sum is σ = 50035968. Its totient is φ = 6119680.

The previous prime is 18634933. The next prime is 18634963. The reversal of 18634944 is 44943681.

It is a happy number.

It is a super-2 number, since 2×18634944² = 694522275766272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12949 + ... + 14315.

Almost surely, 2^18634944 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 18634944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25017984).

18634944 is an abundant number, since it is smaller than the sum of its proper divisors (31401024).

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

18634944 is a wasteful number, since it uses less digits than its factorization.

18634944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453 (or 1443 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 18634944 is about 4316.8210525802. The cubic root of 18634944 is about 265.1201259107.

The spelling of 18634944 in words is "eighteen million, six hundred thirty-four thousand, nine hundred forty-four".