21883760 has 40 divisors (see below), whose sum is σ = 53876016. Its totient is φ = 8238080.

The previous prime is 21883723. The next prime is 21883793. The reversal of 21883760 is 6738812.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 21883760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6686 + ... + 9405.

Almost surely, 2^21883760 is an apocalyptic number.

21883760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21883760 is an abundant number, since it is smaller than the sum of its proper divisors (31992256).

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

21883760 is a wasteful number, since it uses less digits than its factorization.

21883760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16121 (or 16115 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 21883760 is about 4678.0081231225. The cubic root of 21883760 is about 279.7095627863.

The spelling of 21883760 in words is "twenty-one million, eight hundred eighty-three thousand, seven hundred sixty".