18473857709 has 8 divisors (see below), whose sum is σ = 19087529472. Its totient is φ = 17870004880.

The previous prime is 18473857657. The next prime is 18473857739. The reversal of 18473857709 is 90775837481.

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-18473857709 is a prime.

It is a super-3 number, since 3×18473857709³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18473857739) 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, 2450909 + ... + 2458434.

It is an arithmetic number, because the mean of its divisors is an integer number (2385941184).

Almost surely, 2^18473857709 is an apocalyptic number.

It is an amenable number.

18473857709 is a deficient number, since it is larger than the sum of its proper divisors (613671763).

18473857709 is an equidigital number, since it uses as much as digits as its factorization.

18473857709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909467.

The product of its (nonzero) digits is 11854080, while the sum is 59.

The spelling of 18473857709 in words is "eighteen billion, four hundred seventy-three million, eight hundred fifty-seven thousand, seven hundred nine".