18737992 has 48 divisors (see below), whose sum is σ = 44025660. Its totient is φ = 7410816.

The previous prime is 18737977. The next prime is 18738011. The reversal of 18737992 is 29973781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18714276 + 23716 = 4326^2 + 154^2 .

It is a super-2 number, since 2×18737992² = 702224688384128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3258 + ... + 6934.

Almost surely, 2^18737992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18737992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22012830).

18737992 is an abundant number, since it is smaller than the sum of its proper divisors (25287668).

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

18737992 is a wasteful number, since it uses less digits than its factorization.

18737992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710 (or 3699 counting only the distinct ones).

The product of its digits is 190512, while the sum is 46.

The square root of 18737992 is about 4328.7402324464. The cubic root of 18737992 is about 265.6079172774.

The spelling of 18737992 in words is "eighteen million, seven hundred thirty-seven thousand, nine hundred ninety-two".