20626123079 has 4 divisors (see below), whose sum is σ = 21291481920. Its totient is φ = 19960764240.

The previous prime is 20626123031. The next prime is 20626123097. The reversal of 20626123079 is 97032162602.

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 20626123079 - 2³² = 16331155783 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 (20626122079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332679374 + ... + 332679435.

It is an arithmetic number, because the mean of its divisors is an integer number (5322870480).

Almost surely, 2^20626123079 is an apocalyptic number.

20626123079 is a deficient number, since it is larger than the sum of its proper divisors (665358841).

20626123079 is an equidigital number, since it uses as much as digits as its factorization.

20626123079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665358840.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 20626123079 in words is "twenty billion, six hundred twenty-six million, one hundred twenty-three thousand, seventy-nine".