18992442 has 16 divisors (see below), whose sum is σ = 43411392. Its totient is φ = 5426400.

The previous prime is 18992431. The next prime is 18992461. The reversal of 18992442 is 24429981.

It is a self number, because there is not a number n which added to its sum of digits gives 18992442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226059 + ... + 226142.

It is an arithmetic number, because the mean of its divisors is an integer number (2713212).

Almost surely, 2^18992442 is an apocalyptic number.

18992442 is an abundant number, since it is smaller than the sum of its proper divisors (24418950).

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

18992442 is a wasteful number, since it uses less digits than its factorization.

18992442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452213.

The product of its digits is 41472, while the sum is 39.

The square root of 18992442 is about 4358.0318952481. The cubic root of 18992442 is about 266.8047781100.

The spelling of 18992442 in words is "eighteen million, nine hundred ninety-two thousand, four hundred forty-two".