21889300 has 36 divisors (see below), whose sum is σ = 48184416. Its totient is φ = 8629600.

The previous prime is 21889297. The next prime is 21889313. The reversal of 21889300 is 398812.

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, 5559 + ... + 8641.

It is an arithmetic number, because the mean of its divisors is an integer number (1338456).

Almost surely, 2^21889300 is an apocalyptic number.

21889300 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 21889300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24092208).

21889300 is an abundant number, since it is smaller than the sum of its proper divisors (26295116).

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

21889300 is a wasteful number, since it uses less digits than its factorization.

21889300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168 (or 3161 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 21889300 is about 4678.6002180139. The cubic root of 21889300 is about 279.7331641575.

The spelling of 21889300 in words is "twenty-one million, eight hundred eighty-nine thousand, three hundred".