20313084257 has 2 divisors, whose sum is σ = 20313084258. Its totient is φ = 20313084256.

The previous prime is 20313084251. The next prime is 20313084293. The reversal of 20313084257 is 75248031302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14659397776 + 5653686481 = 121076^2 + 75191^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313084257 - 2²⁸ = 20044648801 is a prime.

It is not a weakly prime, because it can be changed into another prime (20313084251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156542128 + 10156542129.

It is an arithmetic number, because the mean of its divisors is an integer number (10156542129).

Almost surely, 2^20313084257 is an apocalyptic number.

It is an amenable number.

20313084257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313084257 is an equidigital number, since it uses as much as digits as its factorization.

20313084257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 20313084257 in words is "twenty billion, three hundred thirteen million, eighty-four thousand, two hundred fifty-seven".