21552540200 has 24 divisors (see below), whose sum is σ = 50109656430. Its totient is φ = 8621016000.

The previous prime is 21552540167. The next prime is 21552540239. The reversal of 21552540200 is 204525512.

It can be written as a sum of positive squares in 3 ways, for example, as 20725057444 + 827482756 = 143962^2 + 28766^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21552540200.

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, 53881151 + ... + 53881550.

Almost surely, 2^21552540200 is an apocalyptic number.

21552540200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21552540200 is an abundant number, since it is smaller than the sum of its proper divisors (28557116230).

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

21552540200 is a wasteful number, since it uses less digits than its factorization.

21552540200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107762717 (or 107762708 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 21552540200 in words is "twenty-one billion, five hundred fifty-two million, five hundred forty thousand, two hundred".