20402037079 has 2 divisors, whose sum is σ = 20402037080. Its totient is φ = 20402037078.

The previous prime is 20402037043. The next prime is 20402037107. The reversal of 20402037079 is 97073020402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402037079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402037479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201018539 + 10201018540.

It is an arithmetic number, because the mean of its divisors is an integer number (10201018540).

Almost surely, 2^20402037079 is an apocalyptic number.

20402037079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402037079 is an equidigital number, since it uses as much as digits as its factorization.

20402037079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The spelling of 20402037079 in words is "twenty billion, four hundred two million, thirty-seven thousand, seventy-nine".