21800703616 has 32 divisors (see below), whose sum is σ = 43446164580. Its totient is φ = 10896568320.

The previous prime is 21800703553. The next prime is 21800703647. The reversal of 21800703616 is 61630700812.

It can be written as a sum of positive squares in 2 ways, for example, as 21750350400 + 50353216 = 147480^2 + 7096^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360696 + ... + 416776.

Almost surely, 2^21800703616 is an apocalyptic number.

It is an amenable number.

21800703616 is a deficient number, since it is larger than the sum of its proper divisors (21645460964).

21800703616 is an equidigital number, since it uses as much as digits as its factorization.

21800703616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59132 (or 59120 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 21800703616 in words is "twenty-one billion, eight hundred million, seven hundred three thousand, six hundred sixteen".