18240924 has 24 divisors (see below), whose sum is σ = 45836560. Its totient is φ = 5612544.

The previous prime is 18240919. The next prime is 18240961. The reversal of 18240924 is 42904281.

It is a junction number, because it is equal to n+sod(n) for n = 18240891 and 18240900.

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, 58309 + ... + 58620.

Almost surely, 2^18240924 is an apocalyptic number.

It is an amenable number.

18240924 is an abundant number, since it is smaller than the sum of its proper divisors (27595636).

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

18240924 is a wasteful number, since it uses less digits than its factorization.

18240924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116949 (or 116947 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18240924 is about 4270.9394751038. The cubic root of 18240924 is about 263.2382194909.

The spelling of 18240924 in words is "eighteen million, two hundred forty thousand, nine hundred twenty-four".