18010000009957 has 2 divisors, whose sum is σ = 18010000009958. Its totient is φ = 18010000009956.

The previous prime is 18010000009927. The next prime is 18010000010059. The reversal of 18010000009957 is 75990000001081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17768534895076 + 241465114881 = 4215274^2 + 491391^2 .

It is a cyclic number.

It is not a de Polignac number, because 18010000009957 - 2⁴³ = 9213906987749 is a prime.

It is a super-2 number, since 2×18010000009957² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18010000009907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005000004978 + 9005000004979.

It is an arithmetic number, because the mean of its divisors is an integer number (9005000004979).

Almost surely, 2^{18010000009957} is an apocalyptic number.

It is an amenable number.

18010000009957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18010000009957 is an equidigital number, since it uses as much as digits as its factorization.

18010000009957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 18010000009957 in words is "eighteen trillion, ten billion, nine thousand, nine hundred fifty-seven".