18831442 has 16 divisors (see below), whose sum is σ = 32518080. Its totient is φ = 8011728.

The previous prime is 18831437. The next prime is 18831479. The reversal of 18831442 is 24413881.

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, 2893 + ... + 6784.

It is an arithmetic number, because the mean of its divisors is an integer number (2032380).

Almost surely, 2^18831442 is an apocalyptic number.

18831442 is a deficient number, since it is larger than the sum of its proper divisors (13686638).

18831442 is a wasteful number, since it uses less digits than its factorization.

18831442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9825.

The product of its digits is 6144, while the sum is 31.

The square root of 18831442 is about 4339.5209413022. The cubic root of 18831442 is about 266.0487313436.

It can be divided in two parts, 188314 and 42, that added together give a square (188356 = 434²).

The spelling of 18831442 in words is "eighteen million, eight hundred thirty-one thousand, four hundred forty-two".