21879204832 has 24 divisors (see below), whose sum is σ = 43717594536. Its totient is φ = 10776323712.

The previous prime is 21879204817. The next prime is 21879204839. The reversal of 21879204832 is 23840297812.

It is a super-2 number, since 2×21879204832² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21879204839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100283 + ... + 5104570.

It is an arithmetic number, because the mean of its divisors is an integer number (1821566439).

Almost surely, 2^21879204832 is an apocalyptic number.

It is an amenable number.

21879204832 is a deficient number, since it is larger than the sum of its proper divisors (21838389704).

21879204832 is a wasteful number, since it uses less digits than its factorization.

21879204832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10204930 (or 10204922 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 21879204832 in words is "twenty-one billion, eight hundred seventy-nine million, two hundred four thousand, eight hundred thirty-two".