20344513056631 has 2 divisors, whose sum is σ = 20344513056632. Its totient is φ = 20344513056630.

The previous prime is 20344513056619. The next prime is 20344513056671. The reversal of 20344513056631 is 13665031544302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20344513056631 - 2²⁹ = 20343976185719 is a prime.

It is a super-2 number, since 2×20344513056631² (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 (20344513056671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172256528315 + 10172256528316.

It is an arithmetic number, because the mean of its divisors is an integer number (10172256528316).

Almost surely, 2^{20344513056631} is an apocalyptic number.

20344513056631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344513056631 is an equidigital number, since it uses as much as digits as its factorization.

20344513056631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 20344513056631 in words is "twenty trillion, three hundred forty-four billion, five hundred thirteen million, fifty-six thousand, six hundred thirty-one".