20257770752731 has 2 divisors, whose sum is σ = 20257770752732. Its totient is φ = 20257770752730.

The previous prime is 20257770752677. The next prime is 20257770752759. The reversal of 20257770752731 is 13725707775202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20257770752731 - 2⁷ = 20257770752603 is a prime.

It is a super-2 number, since 2×20257770752731² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20257770752771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10128885376365 + 10128885376366.

It is an arithmetic number, because the mean of its divisors is an integer number (10128885376366).

Almost surely, 2^{20257770752731} is an apocalyptic number.

20257770752731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20257770752731 is an equidigital number, since it uses as much as digits as its factorization.

20257770752731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10084200, while the sum is 55.

The spelling of 20257770752731 in words is "twenty trillion, two hundred fifty-seven billion, seven hundred seventy million, seven hundred fifty-two thousand, seven hundred thirty-one".