20365642159 has 2 divisors, whose sum is σ = 20365642160. Its totient is φ = 20365642158.

The previous prime is 20365642079. The next prime is 20365642211. The reversal of 20365642159 is 95124656302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20365642159 - 2¹¹ = 20365640111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20365652159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182821079 + 10182821080.

It is an arithmetic number, because the mean of its divisors is an integer number (10182821080).

Almost surely, 2^20365642159 is an apocalyptic number.

20365642159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20365642159 is an equidigital number, since it uses as much as digits as its factorization.

20365642159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 20365642159 in words is "twenty billion, three hundred sixty-five million, six hundred forty-two thousand, one hundred fifty-nine".