18240484 has 6 divisors (see below), whose sum is σ = 31920854. Its totient is φ = 9120240.

The previous prime is 18240479. The next prime is 18240511. The reversal of 18240484 is 48404281.

It can be written as a sum of positive squares in only one way, i.e., 15444900 + 2795584 = 3930^2 + 1672^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2280057 + ... + 2280064.

Almost surely, 2^18240484 is an apocalyptic number.

It is an amenable number.

18240484 is a deficient number, since it is larger than the sum of its proper divisors (13680370).

18240484 is a wasteful number, since it uses less digits than its factorization.

18240484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560125 (or 4560123 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 18240484 is about 4270.8879638782. The cubic root of 18240484 is about 263.2361028995.

The spelling of 18240484 in words is "eighteen million, two hundred forty thousand, four hundred eighty-four".