20370323257 has 2 divisors, whose sum is σ = 20370323258. Its totient is φ = 20370323256.

The previous prime is 20370323227. The next prime is 20370323297. The reversal of 20370323257 is 75232307302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16296820281 + 4073502976 = 127659^2 + 63824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20370323257 is a prime.

It is not a weakly prime, because it can be changed into another prime (20370323227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185161628 + 10185161629.

It is an arithmetic number, because the mean of its divisors is an integer number (10185161629).

Almost surely, 2^20370323257 is an apocalyptic number.

It is an amenable number.

20370323257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20370323257 is an equidigital number, since it uses as much as digits as its factorization.

20370323257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 34.

The spelling of 20370323257 in words is "twenty billion, three hundred seventy million, three hundred twenty-three thousand, two hundred fifty-seven".