18506992 has 40 divisors (see below), whose sum is σ = 41292000. Its totient is φ = 7871232.

The previous prime is 18506987. The next prime is 18507011. The reversal of 18506992 is 29960581.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16134 + ... + 17242.

It is an arithmetic number, because the mean of its divisors is an integer number (1032300).

Almost surely, 2^18506992 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 18506992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20646000).

18506992 is an abundant number, since it is smaller than the sum of its proper divisors (22785008).

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

18506992 is a wasteful number, since it uses less digits than its factorization.

18506992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 18506992 is about 4301.9753602270. The cubic root of 18506992 is about 264.5119389791.

The spelling of 18506992 in words is "eighteen million, five hundred six thousand, nine hundred ninety-two".