21884000 has 48 divisors (see below), whose sum is σ = 53778816. Its totient is φ = 8752000.

The previous prime is 21883997. The next prime is 21884011. The reversal of 21884000 is 48812.

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, 1265 + ... + 6735.

It is an arithmetic number, because the mean of its divisors is an integer number (1120392).

Almost surely, 2^21884000 is an apocalyptic number.

21884000 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 21884000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26889408).

21884000 is an abundant number, since it is smaller than the sum of its proper divisors (31894816).

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

21884000 is an equidigital number, since it uses as much as digits as its factorization.

21884000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 21884000 is about 4678.0337749956. The cubic root of 21884000 is about 279.7105853109.

The spelling of 21884000 in words is "twenty-one million, eight hundred eighty-four thousand".