20818632679 has 8 divisors (see below), whose sum is σ = 22800067920. Its totient is φ = 18891483456.

The previous prime is 20818632623. The next prime is 20818632691. The reversal of 20818632679 is 97623681802.

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 20818632679 - 2¹¹ = 20818630631 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 (20818632479) 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, 13570702 + ... + 13572235.

It is an arithmetic number, because the mean of its divisors is an integer number (2850008490).

Almost surely, 2^20818632679 is an apocalyptic number.

20818632679 is a deficient number, since it is larger than the sum of its proper divisors (1981435241).

20818632679 is a wasteful number, since it uses less digits than its factorization.

20818632679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27143009.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 20818632679 in words is "twenty billion, eight hundred eighteen million, six hundred thirty-two thousand, six hundred seventy-nine".