20110199957 has 2 divisors, whose sum is σ = 20110199958. Its totient is φ = 20110199956.

The previous prime is 20110199951. The next prime is 20110199971. The reversal of 20110199957 is 75999101102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13889565316 + 6220634641 = 117854^2 + 78871^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110199957 - 2⁸ = 20110199701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110199951) 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, 10055099978 + 10055099979.

It is an arithmetic number, because the mean of its divisors is an integer number (10055099979).

Almost surely, 2^20110199957 is an apocalyptic number.

It is an amenable number.

20110199957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110199957 is an equidigital number, since it uses as much as digits as its factorization.

20110199957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 44.

The spelling of 20110199957 in words is "twenty billion, one hundred ten million, one hundred ninety-nine thousand, nine hundred fifty-seven".