21662508102 has 32 divisors (see below), whose sum is σ = 44827365600. Its totient is φ = 6970537728.

The previous prime is 21662508079. The next prime is 21662508173. The reversal of 21662508102 is 20180526612.

It is a congruent 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, 1439674 + ... + 1454642.

It is an arithmetic number, because the mean of its divisors is an integer number (1400855175).

Almost surely, 2^21662508102 is an apocalyptic number.

21662508102 is an abundant number, since it is smaller than the sum of its proper divisors (23164857498).

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

21662508102 is a wasteful number, since it uses less digits than its factorization.

21662508102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23320.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 21662508102 in words is "twenty-one billion, six hundred sixty-two million, five hundred eight thousand, one hundred two".