20397580963 has 2 divisors, whose sum is σ = 20397580964. Its totient is φ = 20397580962.

The previous prime is 20397580961. The next prime is 20397581047. The reversal of 20397580963 is 36908579302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20397580963 - 2¹ = 20397580961 is a prime.

It is a super-2 number, since 2×20397580963² (a number of 21 digits) contains 22 as substring.

Together with 20397580961, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20397580963.

It is not a weakly prime, because it can be changed into another prime (20397580961) 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, 10198790481 + 10198790482.

It is an arithmetic number, because the mean of its divisors is an integer number (10198790482).

Almost surely, 2^20397580963 is an apocalyptic number.

20397580963 is a deficient number, since it is larger than the sum of its proper divisors (1).

20397580963 is an equidigital number, since it uses as much as digits as its factorization.

20397580963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 20397580963 in words is "twenty billion, three hundred ninety-seven million, five hundred eighty thousand, nine hundred sixty-three".