18189301357 has 2 divisors, whose sum is σ = 18189301358. Its totient is φ = 18189301356.

The previous prime is 18189301327. The next prime is 18189301379. The reversal of 18189301357 is 75310398181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18122813641 + 66487716 = 134621^2 + 8154^2 .

It is a cyclic number.

It is not a de Polignac number, because 18189301357 - 2¹¹ = 18189299309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18189301307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9094650678 + 9094650679.

It is an arithmetic number, because the mean of its divisors is an integer number (9094650679).

Almost surely, 2^18189301357 is an apocalyptic number.

It is an amenable number.

18189301357 is a deficient number, since it is larger than the sum of its proper divisors (1).

18189301357 is an equidigital number, since it uses as much as digits as its factorization.

18189301357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 18189301357 in words is "eighteen billion, one hundred eighty-nine million, three hundred one thousand, three hundred fifty-seven".