20302907731 has 2 divisors, whose sum is σ = 20302907732. Its totient is φ = 20302907730.

The previous prime is 20302907687. The next prime is 20302907771. The reversal of 20302907731 is 13770920302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20302907731 is a prime.

It is a super-2 number, since 2×20302907731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20302907771) 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, 10151453865 + 10151453866.

It is an arithmetic number, because the mean of its divisors is an integer number (10151453866).

Almost surely, 2^20302907731 is an apocalyptic number.

20302907731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302907731 is an equidigital number, since it uses as much as digits as its factorization.

20302907731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 34.

The spelling of 20302907731 in words is "twenty billion, three hundred two million, nine hundred seven thousand, seven hundred thirty-one".