21879537676 has 24 divisors (see below), whose sum is σ = 40591711440. Its totient is φ = 10283500032.

The previous prime is 21879537653. The next prime is 21879537677. The reversal of 21879537676 is 67673597812.

It is not an unprimeable number, because it can be changed into a prime (21879537677) 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, 143850 + ... + 253873.

It is an arithmetic number, because the mean of its divisors is an integer number (1691321310).

Almost surely, 2^21879537676 is an apocalyptic number.

It is an amenable number.

21879537676 is a deficient number, since it is larger than the sum of its proper divisors (18712173764).

21879537676 is a wasteful number, since it uses less digits than its factorization.

21879537676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398553 (or 398551 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 61.

The spelling of 21879537676 in words is "twenty-one billion, eight hundred seventy-nine million, five hundred thirty-seven thousand, six hundred seventy-six".