20508120595231 has 2 divisors, whose sum is σ = 20508120595232. Its totient is φ = 20508120595230.

The previous prime is 20508120595217. The next prime is 20508120595253. The reversal of 20508120595231 is 13259502180502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20508120595231 - 2⁵ = 20508120595199 is a prime.

It is a super-2 number, since 2×20508120595231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20508120595201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10254060297615 + 10254060297616.

It is an arithmetic number, because the mean of its divisors is an integer number (10254060297616).

Almost surely, 2^{20508120595231} is an apocalyptic number.

20508120595231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20508120595231 is an equidigital number, since it uses as much as digits as its factorization.

20508120595231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 20508120595231 in words is "twenty trillion, five hundred eight billion, one hundred twenty million, five hundred ninety-five thousand, two hundred thirty-one".