21188832679 has 8 divisors (see below), whose sum is σ = 24243240320. Its totient is φ = 18141282936.

The previous prime is 21188832653. The next prime is 21188832689. The reversal of 21188832679 is 97623888112.

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

It is not a de Polignac number, because 21188832679 - 2⁵ = 21188832647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21188832649) 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, 1707849 + ... + 1720210.

It is an arithmetic number, because the mean of its divisors is an integer number (3030405040).

Almost surely, 2^21188832679 is an apocalyptic number.

21188832679 is a deficient number, since it is larger than the sum of its proper divisors (3054407641).

21188832679 is an equidigital number, since it uses as much as digits as its factorization.

21188832679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428949.

The product of its digits is 2322432, while the sum is 55.

The spelling of 21188832679 in words is "twenty-one billion, one hundred eighty-eight million, eight hundred thirty-two thousand, six hundred seventy-nine".