18990596 has 12 divisors (see below), whose sum is σ = 33358080. Its totient is φ = 9459720.

The previous prime is 18990541. The next prime is 18990599. The reversal of 18990596 is 69509981.

It is a self number, because there is not a number n which added to its sum of digits gives 18990596.

It is not an unprimeable number, because it can be changed into a prime (18990599) 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, 7676 + ... + 9843.

It is an arithmetic number, because the mean of its divisors is an integer number (2779840).

Almost surely, 2^18990596 is an apocalyptic number.

It is an amenable number.

18990596 is a deficient number, since it is larger than the sum of its proper divisors (14367484).

18990596 is a wasteful number, since it uses less digits than its factorization.

18990596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17794 (or 17792 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 18990596 is about 4357.8200972505. The cubic root of 18990596 is about 266.7961336612.

The spelling of 18990596 in words is "eighteen million, nine hundred ninety thousand, five hundred ninety-six".