20079564539 has 2 divisors, whose sum is σ = 20079564540. Its totient is φ = 20079564538.

The previous prime is 20079564511. The next prime is 20079564563. The reversal of 20079564539 is 93546597002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20079564539 - 2³² = 15784597243 is a prime.

It is not a weakly prime, because it can be changed into another prime (20079564509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039782269 + 10039782270.

It is an arithmetic number, because the mean of its divisors is an integer number (10039782270).

Almost surely, 2^20079564539 is an apocalyptic number.

20079564539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20079564539 is an equidigital number, since it uses as much as digits as its factorization.

20079564539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 50.

The spelling of 20079564539 in words is "twenty billion, seventy-nine million, five hundred sixty-four thousand, five hundred thirty-nine".