21900856202 has 32 divisors (see below), whose sum is σ = 34206796800. Its totient is φ = 10503763200.

The previous prime is 21900856199. The next prime is 21900856213. The reversal of 21900856202 is 20265800912.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6693827 + ... + 6697097.

It is an arithmetic number, because the mean of its divisors is an integer number (1068962400).

Almost surely, 2^21900856202 is an apocalyptic number.

21900856202 is a deficient number, since it is larger than the sum of its proper divisors (12305940598).

21900856202 is a wasteful number, since it uses less digits than its factorization.

21900856202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 21900856202 in words is "twenty-one billion, nine hundred million, eight hundred fifty-six thousand, two hundred two".