18314861917 has 4 divisors (see below), whose sum is σ = 19979849376. Its totient is φ = 16649874460.

The previous prime is 18314861899. The next prime is 18314861933. The reversal of 18314861917 is 71916841381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18314861917 - 2¹¹ = 18314859869 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 (18314861317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832493713 + ... + 832493734.

It is an arithmetic number, because the mean of its divisors is an integer number (4994962344).

Almost surely, 2^18314861917 is an apocalyptic number.

It is an amenable number.

18314861917 is a deficient number, since it is larger than the sum of its proper divisors (1664987459).

18314861917 is a wasteful number, since it uses less digits than its factorization.

18314861917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664987458.

The product of its digits is 290304, while the sum is 49.

The spelling of 18314861917 in words is "eighteen billion, three hundred fourteen million, eight hundred sixty-one thousand, nine hundred seventeen".