18437944 has 32 divisors (see below), whose sum is σ = 39667680. Its totient is φ = 7870464.

The previous prime is 18437929. The next prime is 18437957. The reversal of 18437944 is 44973481.

It is a junction number, because it is equal to n+sod(n) for n = 18437897 and 18437906.

It is a congruent number.

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, 18384 + ... + 19360.

It is an arithmetic number, because the mean of its divisors is an integer number (1239615).

Almost surely, 2^18437944 is an apocalyptic number.

18437944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18437944 is an abundant number, since it is smaller than the sum of its proper divisors (21229736).

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

18437944 is a wasteful number, since it uses less digits than its factorization.

18437944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327 (or 1323 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 18437944 is about 4293.9427103770. The cubic root of 18437944 is about 264.1825719055.

The spelling of 18437944 in words is "eighteen million, four hundred thirty-seven thousand, nine hundred forty-four".