18712346917 has 8 divisors (see below), whose sum is σ = 20414459520. Its totient is φ = 17010399360.

The previous prime is 18712346881. The next prime is 18712346941. The reversal of 18712346917 is 71964321781.

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

It is a cyclic number.

It is not a de Polignac number, because 18712346917 - 2⁷ = 18712346789 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 (18712346977) 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 7 ways as a sum of consecutive naturals, for example, 422068 + ... + 464290.

It is an arithmetic number, because the mean of its divisors is an integer number (2551807440).

Almost surely, 2^18712346917 is an apocalyptic number.

It is an amenable number.

18712346917 is a deficient number, since it is larger than the sum of its proper divisors (1702112603).

18712346917 is a wasteful number, since it uses less digits than its factorization.

18712346917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82523.

The product of its digits is 508032, while the sum is 49.

The spelling of 18712346917 in words is "eighteen billion, seven hundred twelve million, three hundred forty-six thousand, nine hundred seventeen".