21832756679 has 4 divisors (see below), whose sum is σ = 21854141400. Its totient is φ = 21811371960.

The previous prime is 21832756637. The next prime is 21832756681. The reversal of 21832756679 is 97665723812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21832756679 - 2²⁰ = 21831708103 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 (21832756609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10690829 + ... + 10692870.

It is an arithmetic number, because the mean of its divisors is an integer number (5463535350).

Almost surely, 2^21832756679 is an apocalyptic number.

21832756679 is a deficient number, since it is larger than the sum of its proper divisors (21384721).

21832756679 is a wasteful number, since it uses less digits than its factorization.

21832756679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21384720.

The product of its digits is 7620480, while the sum is 56.

The spelling of 21832756679 in words is "twenty-one billion, eight hundred thirty-two million, seven hundred fifty-six thousand, six hundred seventy-nine".