18990296 has 16 divisors (see below), whose sum is σ = 38346000. Its totient is φ = 8764704.

The previous prime is 18990277. The next prime is 18990311. The reversal of 18990296 is 69209981.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91196 + ... + 91403.

It is an arithmetic number, because the mean of its divisors is an integer number (2396625).

Almost surely, 2^18990296 is an apocalyptic number.

It is an amenable number.

18990296 is an abundant number, since it is smaller than the sum of its proper divisors (19355704).

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

18990296 is a wasteful number, since it uses less digits than its factorization.

18990296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182618 (or 182614 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 18990296 is about 4357.7856762351. The cubic root of 18990296 is about 266.7947287683.

The spelling of 18990296 in words is "eighteen million, nine hundred ninety thousand, two hundred ninety-six".