21876988079 has 8 divisors (see below), whose sum is σ = 22060874880. Its totient is φ = 21693357400.

The previous prime is 21876988051. The next prime is 21876988087. The reversal of 21876988079 is 97088967812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21876988079 - 2³² = 17582020783 is a prime.

It is a super-2 number, since 2×21876988079² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21876988099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109484 + ... + 236094.

It is an arithmetic number, because the mean of its divisors is an integer number (2757609360).

Almost surely, 2^21876988079 is an apocalyptic number.

21876988079 is a deficient number, since it is larger than the sum of its proper divisors (183886801).

21876988079 is a wasteful number, since it uses less digits than its factorization.

21876988079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128061.

The product of its (nonzero) digits is 24385536, while the sum is 65.

The spelling of 21876988079 in words is "twenty-one billion, eight hundred seventy-six million, nine hundred eighty-eight thousand, seventy-nine".