21883792 has 60 divisors (see below), whose sum is σ = 49984896. Its totient is φ = 9253440.

The previous prime is 21883723. The next prime is 21883793. The reversal of 21883792 is 29738812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21883793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80617 + ... + 80887.

Almost surely, 2^21883792 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 21883792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24992448).

21883792 is an abundant number, since it is smaller than the sum of its proper divisors (28101104).

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

21883792 is a wasteful number, since it uses less digits than its factorization.

21883792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 383 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 21883792 is about 4678.0115433804. The cubic root of 21883792 is about 279.7096991233.

The spelling of 21883792 in words is "twenty-one million, eight hundred eighty-three thousand, seven hundred ninety-two".