20357244101 has 2 divisors, whose sum is σ = 20357244102. Its totient is φ = 20357244100.

The previous prime is 20357244073. The next prime is 20357244113. The reversal of 20357244101 is 10144275302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13392507076 + 6964737025 = 115726^2 + 83455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20357244101 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20357244181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178622050 + 10178622051.

It is an arithmetic number, because the mean of its divisors is an integer number (10178622051).

Almost surely, 2^20357244101 is an apocalyptic number.

It is an amenable number.

20357244101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20357244101 is an equidigital number, since it uses as much as digits as its factorization.

20357244101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The spelling of 20357244101 in words is "twenty billion, three hundred fifty-seven million, two hundred forty-four thousand, one hundred one".