21902100200 has 24 divisors (see below), whose sum is σ = 50922383430. Its totient is φ = 8760840000.

The previous prime is 21902100173. The next prime is 21902100257. The reversal of 21902100200 is 200120912.

It can be written as a sum of positive squares in 3 ways, for example, as 20302260196 + 1599840004 = 142486^2 + 39998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54755051 + ... + 54755450.

Almost surely, 2^21902100200 is an apocalyptic number.

21902100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21902100200 is an abundant number, since it is smaller than the sum of its proper divisors (29020283230).

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

21902100200 is a wasteful number, since it uses less digits than its factorization.

21902100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109510517 (or 109510508 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 21902100200 in words is "twenty-one billion, nine hundred two million, one hundred thousand, two hundred".