18490992 has 40 divisors (see below), whose sum is σ = 51444624. Its totient is φ = 5689344.

The previous prime is 18490987. The next prime is 18490999. The reversal of 18490992 is 29909481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18490999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14193 + ... + 15440.

Almost surely, 2^18490992 is an apocalyptic number.

18490992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18490992 is an abundant number, since it is smaller than the sum of its proper divisors (32953632).

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

18490992 is a wasteful number, since it uses less digits than its factorization.

18490992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29657 (or 29651 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 18490992 is about 4300.1153472901. The cubic root of 18490992 is about 264.4356901171.

The spelling of 18490992 in words is "eighteen million, four hundred ninety thousand, nine hundred ninety-two".