21884892 has 24 divisors (see below), whose sum is σ = 52152576. Its totient is φ = 7139568.

The previous prime is 21884873. The next prime is 21884897. The reversal of 21884892 is 29848812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21884897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18838 + ... + 19965.

It is an arithmetic number, because the mean of its divisors is an integer number (2173024).

Almost surely, 2^21884892 is an apocalyptic number.

It is an amenable number.

21884892 is an abundant number, since it is smaller than the sum of its proper divisors (30267684).

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

21884892 is a wasteful number, since it uses less digits than its factorization.

21884892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38857 (or 38855 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 21884892 is about 4678.1291132246. The cubic root of 21884892 is about 279.7143856285.

The spelling of 21884892 in words is "twenty-one million, eight hundred eighty-four thousand, eight hundred ninety-two".