21883800 has 48 divisors (see below), whose sum is σ = 67841640. Its totient is φ = 5835520.

The previous prime is 21883793. The next prime is 21883817. The reversal of 21883800 is 838812.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17637 + ... + 18836.

Almost surely, 2^21883800 is an apocalyptic number.

21883800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21883800 is an abundant number, since it is smaller than the sum of its proper divisors (45957840).

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

21883800 is a wasteful number, since it uses less digits than its factorization.

21883800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36492 (or 36483 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 21883800 is about 4678.0123984445. The cubic root of 21883800 is about 279.7097332075.

The spelling of 21883800 in words is "twenty-one million, eight hundred eighty-three thousand, eight hundred".