20001101957 has 2 divisors, whose sum is σ = 20001101958. Its totient is φ = 20001101956.

The previous prime is 20001101927. The next prime is 20001101971. The reversal of 20001101957 is 75910110002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19960320961 + 40780996 = 141281^2 + 6386^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001101957 - 2¹² = 20001097861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001101927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000550978 + 10000550979.

It is an arithmetic number, because the mean of its divisors is an integer number (10000550979).

Almost surely, 2^20001101957 is an apocalyptic number.

It is an amenable number.

20001101957 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001101957 is an equidigital number, since it uses as much as digits as its factorization.

20001101957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 26.

Adding to 20001101957 its reverse (75910110002), we get a palindrome (95911211959).

The spelling of 20001101957 in words is "twenty billion, one million, one hundred one thousand, nine hundred fifty-seven".