21883740 has 48 divisors (see below), whose sum is σ = 61477920. Its totient is φ = 5816320.

The previous prime is 21883723. The next prime is 21883793. The reversal of 21883740 is 4738812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33820 + ... + 34460.

It is an arithmetic number, because the mean of its divisors is an integer number (1280790).

Almost surely, 2^21883740 is an apocalyptic number.

21883740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21883740 is an abundant number, since it is smaller than the sum of its proper divisors (39594180).

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

21883740 is a wasteful number, since it uses less digits than its factorization.

21883740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 21883740 is about 4678.0059854600. The cubic root of 21883740 is about 279.7094775755.

The spelling of 21883740 in words is "twenty-one million, eight hundred eighty-three thousand, seven hundred forty".