20201200999957 has 2 divisors, whose sum is σ = 20201200999958. Its totient is φ = 20201200999956.

The previous prime is 20201200999943. The next prime is 20201201000017. The reversal of 20201200999957 is 75999900210202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12784979720881 + 7416221279076 = 3575609^2 + 2723274^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201200999957 - 2²³ = 20201192611349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201200999898 and 20201200999907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201200999157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100600499978 + 10100600499979.

It is an arithmetic number, because the mean of its divisors is an integer number (10100600499979).

Almost surely, 2^{20201200999957} is an apocalyptic number.

It is an amenable number.

20201200999957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201200999957 is an equidigital number, since it uses as much as digits as its factorization.

20201200999957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 20201200999957 in words is "twenty trillion, two hundred one billion, two hundred million, nine hundred ninety-nine thousand, nine hundred fifty-seven".