18408685747 has 8 divisors (see below), whose sum is σ = 18517695840. Its totient is φ = 18299990400.

The previous prime is 18408685741. The next prime is 18408685751. The reversal of 18408685747 is 74758680481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18408685747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18408685691 and 18408685700.

It is not an unprimeable number, because it can be changed into a prime (18408685741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39154 + ... + 195832.

It is an arithmetic number, because the mean of its divisors is an integer number (2314711980).

Almost surely, 2^18408685747 is an apocalyptic number.

18408685747 is a deficient number, since it is larger than the sum of its proper divisors (109010093).

18408685747 is a wasteful number, since it uses less digits than its factorization.

18408685747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157373.

The product of its (nonzero) digits is 12042240, while the sum is 58.

The spelling of 18408685747 in words is "eighteen billion, four hundred eight million, six hundred eighty-five thousand, seven hundred forty-seven".