20254405957 has 2 divisors, whose sum is σ = 20254405958. Its totient is φ = 20254405956.

The previous prime is 20254405909. The next prime is 20254405967. The reversal of 20254405957 is 75950445202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18309066721 + 1945339236 = 135311^2 + 44106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20254405957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20254405907) 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, 10127202978 + 10127202979.

It is an arithmetic number, because the mean of its divisors is an integer number (10127202979).

Almost surely, 2^20254405957 is an apocalyptic number.

It is an amenable number.

20254405957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20254405957 is an equidigital number, since it uses as much as digits as its factorization.

20254405957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 20254405957 in words is "twenty billion, two hundred fifty-four million, four hundred five thousand, nine hundred fifty-seven".