22139994 has 16 divisors (see below), whose sum is σ = 44376768. Its totient is φ = 7363872.

The previous prime is 22139993. The next prime is 22140029. The reversal of 22139994 is 49993122.

It is not an unprimeable number, because it can be changed into a prime (22139993) 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, 867 + ... + 6710.

It is an arithmetic number, because the mean of its divisors is an integer number (2773548).

Almost surely, 2^22139994 is an apocalyptic number.

22139994 is an abundant number, since it is smaller than the sum of its proper divisors (22236774).

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

22139994 is a wasteful number, since it uses less digits than its factorization.

22139994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069.

The product of its digits is 34992, while the sum is 39.

The square root of 22139994 is about 4705.3155048307. The cubic root of 22139994 is about 280.7970233286.

The spelling of 22139994 in words is "twenty-two million, one hundred thirty-nine thousand, nine hundred ninety-four".