20567145899 has 2 divisors, whose sum is σ = 20567145900. Its totient is φ = 20567145898.

The previous prime is 20567145857. The next prime is 20567145923. The reversal of 20567145899 is 99854176502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20567145899 - 2²⁰ = 20566097323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20567145839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10283572949 + 10283572950.

It is an arithmetic number, because the mean of its divisors is an integer number (10283572950).

Almost surely, 2^20567145899 is an apocalyptic number.

20567145899 is a deficient number, since it is larger than the sum of its proper divisors (1).

20567145899 is an equidigital number, since it uses as much as digits as its factorization.

20567145899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 20567145899 in words is "twenty billion, five hundred sixty-seven million, one hundred forty-five thousand, eight hundred ninety-nine".