21796992 has 256 divisors, whose sum is σ = 79315200. Its totient is φ = 5750784.

The previous prime is 21796981. The next prime is 21797003. The reversal of 21796992 is 29969712.

It is an interprime number because it is at equal distance from previous prime (21796981) and next prime (21797003).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411238 + ... + 411290.

It is an arithmetic number, because the mean of its divisors is an integer number (309825).

Almost surely, 2^21796992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21796992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39657600).

21796992 is an abundant number, since it is smaller than the sum of its proper divisors (57518208).

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

21796992 is a wasteful number, since it uses less digits than its factorization.

21796992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 82 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 21796992 is about 4668.7248794505. The cubic root of 21796992 is about 279.3393950391.

The spelling of 21796992 in words is "twenty-one million, seven hundred ninety-six thousand, nine hundred ninety-two".