20324203199957 has 2 divisors, whose sum is σ = 20324203199958. Its totient is φ = 20324203199956.

The previous prime is 20324203199903. The next prime is 20324203199969. The reversal of 20324203199957 is 75999130242302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19266779687236 + 1057423512721 = 4389394^2 + 1028311^2 .

It is a cyclic number.

It is not a de Polignac number, because 20324203199957 - 2¹⁸ = 20324202937813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20324203199257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162101599978 + 10162101599979.

It is an arithmetic number, because the mean of its divisors is an integer number (10162101599979).

Almost surely, 2^{20324203199957} is an apocalyptic number.

It is an amenable number.

20324203199957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324203199957 is an equidigital number, since it uses as much as digits as its factorization.

20324203199957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 20324203199957 in words is "twenty trillion, three hundred twenty-four billion, two hundred three million, one hundred ninety-nine thousand, nine hundred fifty-seven".