18364517745 has 32 divisors (see below), whose sum is σ = 33591436032. Its totient is φ = 8392557312.

The previous prime is 18364517723. The next prime is 18364517761. The reversal of 18364517745 is 54771546381.

It is a happy number.

It is not a de Polignac number, because 18364517745 - 2⁵ = 18364517713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328239 + ... + 380091.

It is an arithmetic number, because the mean of its divisors is an integer number (1049732376).

Almost surely, 2^18364517745 is an apocalyptic number.

18364517745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18364517745 is a deficient number, since it is larger than the sum of its proper divisors (15226918287).

18364517745 is a wasteful number, since it uses less digits than its factorization.

18364517745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55241.

The product of its digits is 2822400, while the sum is 51.

The spelling of 18364517745 in words is "eighteen billion, three hundred sixty-four million, five hundred seventeen thousand, seven hundred forty-five".