18601741685 has 16 divisors (see below), whose sum is σ = 22708753392. Its totient is φ = 14624064000.

The previous prime is 18601741681. The next prime is 18601741687. The reversal of 18601741685 is 58614710681.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12456122449 + 6145619236 = 111607^2 + 78394^2 .

It is not a de Polignac number, because 18601741685 - 2² = 18601741681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18601741681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313385 + ... + 367985.

It is an arithmetic number, because the mean of its divisors is an integer number (1419297087).

Almost surely, 2^18601741685 is an apocalyptic number.

It is an amenable number.

18601741685 is a deficient number, since it is larger than the sum of its proper divisors (4107011707).

18601741685 is a wasteful number, since it uses less digits than its factorization.

18601741685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55784.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 18601741685 in words is "eighteen billion, six hundred one million, seven hundred forty-one thousand, six hundred eighty-five".