20964360631 has 2 divisors, whose sum is σ = 20964360632. Its totient is φ = 20964360630.

The previous prime is 20964360583. The next prime is 20964360649. The reversal of 20964360631 is 13606346902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20964360631 - 2⁷ = 20964360503 is a prime.

It is a super-2 number, since 2×20964360631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20964367631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10482180315 + 10482180316.

It is an arithmetic number, because the mean of its divisors is an integer number (10482180316).

Almost surely, 2^20964360631 is an apocalyptic number.

20964360631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20964360631 is an equidigital number, since it uses as much as digits as its factorization.

20964360631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 40.

The spelling of 20964360631 in words is "twenty billion, nine hundred sixty-four million, three hundred sixty thousand, six hundred thirty-one".