18440924 has 12 divisors (see below), whose sum is σ = 32309424. Its totient is φ = 9209664.

The previous prime is 18440923. The next prime is 18440927. The reversal of 18440924 is 42904481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440921) 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, 2084 + ... + 6420.

It is an arithmetic number, because the mean of its divisors is an integer number (2692452).

Almost surely, 2^18440924 is an apocalyptic number.

It is an amenable number.

18440924 is a deficient number, since it is larger than the sum of its proper divisors (13868500).

18440924 is a wasteful number, since it uses less digits than its factorization.

18440924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404 (or 5402 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18440924 is about 4294.2896967950. The cubic root of 18440924 is about 264.1968038187.

The spelling of 18440924 in words is "eighteen million, four hundred forty thousand, nine hundred twenty-four".