21884692 has 12 divisors (see below), whose sum is σ = 38345076. Its totient is φ = 10928960.

The previous prime is 21884689. The next prime is 21884699. The reversal of 21884692 is 29648812.

It can be written as a sum of positive squares in 2 ways, for example, as 10023556 + 11861136 = 3166^2 + 3444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21884699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942 + ... + 6682.

It is an arithmetic number, because the mean of its divisors is an integer number (3195423).

Almost surely, 2^21884692 is an apocalyptic number.

It is an amenable number.

21884692 is a deficient number, since it is larger than the sum of its proper divisors (16460384).

21884692 is a wasteful number, since it uses less digits than its factorization.

21884692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6698 (or 6696 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 21884692 is about 4678.1077371091. The cubic root of 21884692 is about 279.7135335483.

The spelling of 21884692 in words is "twenty-one million, eight hundred eighty-four thousand, six hundred ninety-two".