18957440101 has 2 divisors, whose sum is σ = 18957440102. Its totient is φ = 18957440100.

The previous prime is 18957440093. The next prime is 18957440113. The reversal of 18957440101 is 10104475981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18940915876 + 16524225 = 137626^2 + 4065^2 .

It is a cyclic number.

It is not a de Polignac number, because 18957440101 - 2³ = 18957440093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18957440501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9478720050 + 9478720051.

It is an arithmetic number, because the mean of its divisors is an integer number (9478720051).

Almost surely, 2^18957440101 is an apocalyptic number.

It is an amenable number.

18957440101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18957440101 is an equidigital number, since it uses as much as digits as its factorization.

18957440101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 18957440101 in words is "eighteen billion, nine hundred fifty-seven million, four hundred forty thousand, one hundred one".