21883080 has 96 divisors (see below), whose sum is σ = 69848640. Its totient is φ = 5483520.

The previous prime is 21883073. The next prime is 21883111. The reversal of 21883080 is 8038812.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34365 + ... + 34995.

It is an arithmetic number, because the mean of its divisors is an integer number (727590).

Almost surely, 2^21883080 is an apocalyptic number.

21883080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21883080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34924320).

21883080 is an abundant number, since it is smaller than the sum of its proper divisors (47965560).

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

21883080 is a wasteful number, since it uses less digits than its factorization.

21883080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 658 counting only the distinct ones).

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

The square root of 21883080 is about 4677.9354420513. The cubic root of 21883080 is about 279.7066655926.

The spelling of 21883080 in words is "twenty-one million, eight hundred eighty-three thousand, eighty".