18364889350957 has 2 divisors, whose sum is σ = 18364889350958. Its totient is φ = 18364889350956.

The previous prime is 18364889350939. The next prime is 18364889350961. The reversal of 18364889350957 is 75905398846381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15672881292201 + 2692008058756 = 3958899^2 + 1640734^2 .

It is a cyclic number.

It is not a de Polignac number, because 18364889350957 - 2¹¹ = 18364889348909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18364889350757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9182444675478 + 9182444675479.

It is an arithmetic number, because the mean of its divisors is an integer number (9182444675479).

Almost surely, 2^{18364889350957} is an apocalyptic number.

It is an amenable number.

18364889350957 is a deficient number, since it is larger than the sum of its proper divisors (1).

18364889350957 is an equidigital number, since it uses as much as digits as its factorization.

18364889350957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1567641600, while the sum is 76.

The spelling of 18364889350957 in words is "eighteen trillion, three hundred sixty-four billion, eight hundred eighty-nine million, three hundred fifty thousand, nine hundred fifty-seven".