18357351073 has 2 divisors, whose sum is σ = 18357351074. Its totient is φ = 18357351072.

The previous prime is 18357351059. The next prime is 18357351191. The reversal of 18357351073 is 37015375381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12022464609 + 6334886464 = 109647^2 + 79592^2 .

It is a cyclic number.

It is not a de Polignac number, because 18357351073 - 2²¹ = 18355253921 is a prime.

It is not a weakly prime, because it can be changed into another prime (18357351053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9178675536 + 9178675537.

It is an arithmetic number, because the mean of its divisors is an integer number (9178675537).

Almost surely, 2^18357351073 is an apocalyptic number.

It is an amenable number.

18357351073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18357351073 is an equidigital number, since it uses as much as digits as its factorization.

18357351073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 18357351073 in words is "eighteen billion, three hundred fifty-seven million, three hundred fifty-one thousand, seventy-three".