21893892 has 24 divisors (see below), whose sum is σ = 54091296. Its totient is φ = 6868608.

The previous prime is 21893891. The next prime is 21893933. The reversal of 21893892 is 29839812.

It is not an unprimeable number, because it can be changed into a prime (21893891) 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, 53458 + ... + 53865.

It is an arithmetic number, because the mean of its divisors is an integer number (2253804).

Almost surely, 2^21893892 is an apocalyptic number.

It is an amenable number.

21893892 is an abundant number, since it is smaller than the sum of its proper divisors (32197404).

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

21893892 is a wasteful number, since it uses less digits than its factorization.

21893892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107347 (or 107345 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 21893892 is about 4679.0909373510. The cubic root of 21893892 is about 279.7527238644.

The spelling of 21893892 in words is "twenty-one million, eight hundred ninety-three thousand, eight hundred ninety-two".