20801375510659 has 2 divisors, whose sum is σ = 20801375510660. Its totient is φ = 20801375510658.

The previous prime is 20801375510627. The next prime is 20801375510681. The reversal of 20801375510659 is 95601557310802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20801375510659 - 2⁵ = 20801375510627 is a prime.

It is a super-2 number, since 2×20801375510659² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20801375514659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10400687755329 + 10400687755330.

It is an arithmetic number, because the mean of its divisors is an integer number (10400687755330).

Almost surely, 2^{20801375510659} is an apocalyptic number.

20801375510659 is a deficient number, since it is larger than the sum of its proper divisors (1).

20801375510659 is an equidigital number, since it uses as much as digits as its factorization.

20801375510659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268000, while the sum is 52.

The spelling of 20801375510659 in words is "twenty trillion, eight hundred one billion, three hundred seventy-five million, five hundred ten thousand, six hundred fifty-nine".