18117357434 has 8 divisors (see below), whose sum is σ = 29646584928. Its totient is φ = 8235162460.

The previous prime is 18117357431. The next prime is 18117357443. The reversal of 18117357434 is 43475371181.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18117357431) 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, 411758102 + ... + 411758145.

It is an arithmetic number, because the mean of its divisors is an integer number (3705823116).

Almost surely, 2^18117357434 is an apocalyptic number.

18117357434 is a deficient number, since it is larger than the sum of its proper divisors (11529227494).

18117357434 is a wasteful number, since it uses less digits than its factorization.

18117357434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823516260.

The product of its digits is 282240, while the sum is 44.

The spelling of 18117357434 in words is "eighteen billion, one hundred seventeen million, three hundred fifty-seven thousand, four hundred thirty-four".