20116645992731 has 2 divisors, whose sum is σ = 20116645992732. Its totient is φ = 20116645992730.

The previous prime is 20116645992727. The next prime is 20116645992763. The reversal of 20116645992731 is 13729954661102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20116645992731 - 2² = 20116645992727 is a prime.

It is a super-3 number, since 3×20116645992731³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20116645992031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058322996365 + 10058322996366.

It is an arithmetic number, because the mean of its divisors is an integer number (10058322996366).

Almost surely, 2^{20116645992731} is an apocalyptic number.

20116645992731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20116645992731 is an equidigital number, since it uses as much as digits as its factorization.

20116645992731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 20116645992731 in words is "twenty trillion, one hundred sixteen billion, six hundred forty-five million, nine hundred ninety-two thousand, seven hundred thirty-one".