18473591709 has 6 divisors (see below), whose sum is σ = 26684076926. Its totient is φ = 12315727800.

The previous prime is 18473591599. The next prime is 18473591723. The reversal of 18473591709 is 90719537481.

It is a happy number.

18473591709 is a `hidden beast` number, since 1 + 8 + 47 + 3 + 591 + 7 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11680205625 + 6793386084 = 108075^2 + 82422^2 .

It is not a de Polignac number, because 18473591709 - 2⁷ = 18473591581 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 (18473591779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1026310642 + ... + 1026310659.

Almost surely, 2^18473591709 is an apocalyptic number.

It is an amenable number.

18473591709 is a deficient number, since it is larger than the sum of its proper divisors (8210485217).

18473591709 is a wasteful number, since it uses less digits than its factorization.

18473591709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052621307 (or 2052621304 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 18473591709 in words is "eighteen billion, four hundred seventy-three million, five hundred ninety-one thousand, seven hundred nine".