18364371757 has 4 divisors (see below), whose sum is σ = 18380300380. Its totient is φ = 18348443136.

The previous prime is 18364371743. The next prime is 18364371761. The reversal of 18364371757 is 75717346381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75717346381 = 53 ⋅1428629177.

It can be written as a sum of positive squares in 2 ways, for example, as 7202237956 + 11162133801 = 84866^2 + 105651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18364371757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18364371457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7962582 + ... + 7964887.

It is an arithmetic number, because the mean of its divisors is an integer number (4595075095).

Almost surely, 2^18364371757 is an apocalyptic number.

It is an amenable number.

18364371757 is a deficient number, since it is larger than the sum of its proper divisors (15928623).

18364371757 is a wasteful number, since it uses less digits than its factorization.

18364371757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15928622.

The product of its digits is 2963520, while the sum is 52.

The spelling of 18364371757 in words is "eighteen billion, three hundred sixty-four million, three hundred seventy-one thousand, seven hundred fifty-seven".