21900200 has 48 divisors (see below), whose sum is σ = 58195680. Its totient is φ = 7508160.

The previous prime is 21900181. The next prime is 21900227. The reversal of 21900200 is 200912.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 6422 + ... + 9221.

It is an arithmetic number, because the mean of its divisors is an integer number (1212410).

Almost surely, 2^21900200 is an apocalyptic number.

21900200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21900200 is an abundant number, since it is smaller than the sum of its proper divisors (36295480).

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

21900200 is a wasteful number, since it uses less digits than its factorization.

21900200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15666 (or 15657 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 21900200 is about 4679.7649513624. The cubic root of 21900200 is about 279.7795884458.

The spelling of 21900200 in words is "twenty-one million, nine hundred thousand, two hundred".