20508120595199 has 2 divisors, whose sum is σ = 20508120595200. Its totient is φ = 20508120595198.

The previous prime is 20508120595181. The next prime is 20508120595201. The reversal of 20508120595199 is 99159502180502.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20508120595199 - 2⁴⁴ = 2915934550783 is a prime.

Together with 20508120595201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20508120595399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10254060297599 + 10254060297600.

It is an arithmetic number, because the mean of its divisors is an integer number (10254060297600).

Almost surely, 2^{20508120595199} is an apocalyptic number.

20508120595199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20508120595199 is an equidigital number, since it uses as much as digits as its factorization.

20508120595199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916000, while the sum is 56.

The spelling of 20508120595199 in words is "twenty trillion, five hundred eight billion, one hundred twenty million, five hundred ninety-five thousand, one hundred ninety-nine".