21662329272 has 32 divisors (see below), whose sum is σ = 55043627280. Its totient is φ = 7102402560.

The previous prime is 21662329261. The next prime is 21662329289. The reversal of 21662329272 is 27292326612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7396873 + ... + 7399800.

Almost surely, 2^21662329272 is an apocalyptic number.

It is an amenable number.

21662329272 is an abundant number, since it is smaller than the sum of its proper divisors (33381298008).

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

21662329272 is a wasteful number, since it uses less digits than its factorization.

21662329272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14796743 (or 14796739 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The spelling of 21662329272 in words is "twenty-one billion, six hundred sixty-two million, three hundred twenty-nine thousand, two hundred seventy-two".