20855679743 has 8 divisors (see below), whose sum is σ = 21013006080. Its totient is φ = 20698427520.

The previous prime is 20855679737. The next prime is 20855679751. The reversal of 20855679743 is 34797655802.

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 20855679743 - 2¹⁶ = 20855614207 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 (20855679763) 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, 631778 + ... + 663968.

It is an arithmetic number, because the mean of its divisors is an integer number (2626625760).

Almost surely, 2^20855679743 is an apocalyptic number.

20855679743 is a deficient number, since it is larger than the sum of its proper divisors (157326337).

20855679743 is a wasteful number, since it uses less digits than its factorization.

20855679743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37057.

The product of its (nonzero) digits is 12700800, while the sum is 56.

The spelling of 20855679743 in words is "twenty billion, eight hundred fifty-five million, six hundred seventy-nine thousand, seven hundred forty-three".