20826712957 has 8 divisors (see below), whose sum is σ = 21956268096. Its totient is φ = 19715828352.

The previous prime is 20826712931. The next prime is 20826712987. The reversal of 20826712957 is 75921762802.

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 20826712957 - 2¹¹ = 20826710909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20826712957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826712987) 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, 4665343 + ... + 4669804.

It is an arithmetic number, because the mean of its divisors is an integer number (2744533512).

Almost surely, 2^20826712957 is an apocalyptic number.

It is an amenable number.

20826712957 is a deficient number, since it is larger than the sum of its proper divisors (1129555139).

20826712957 is an equidigital number, since it uses as much as digits as its factorization.

20826712957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9335267.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 20826712957 in words is "twenty billion, eight hundred twenty-six million, seven hundred twelve thousand, nine hundred fifty-seven".