21883880 has 16 divisors (see below), whose sum is σ = 49238820. Its totient is φ = 8753536.

The previous prime is 21883871. The next prime is 21883907. The reversal of 21883880 is 8838812.

It can be written as a sum of positive squares in 2 ways, for example, as 21883684 + 196 = 4678^2 + 14^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273509 + ... + 273588.

Almost surely, 2^21883880 is an apocalyptic number.

21883880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21883880 is an abundant number, since it is smaller than the sum of its proper divisors (27354940).

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

21883880 is a wasteful number, since it uses less digits than its factorization.

21883880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547108 (or 547104 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 21883880 is about 4678.0209490766. The cubic root of 21883880 is about 279.7100740495.

The spelling of 21883880 in words is "twenty-one million, eight hundred eighty-three thousand, eight hundred eighty".