18317929 has 8 divisors (see below), whose sum is σ = 21230208. Its totient is φ = 15479520.

The previous prime is 18317927. The next prime is 18317933. The reversal of 18317929 is 92971381.

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

It is not a de Polignac number, because 18317929 - 2¹ = 18317927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18317891 and 18317900.

It is not an unprimeable number, because it can be changed into a prime (18317927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17932 + ... + 18925.

It is an arithmetic number, because the mean of its divisors is an integer number (2653776).

Almost surely, 2^18317929 is an apocalyptic number.

It is an amenable number.

18317929 is a deficient number, since it is larger than the sum of its proper divisors (2912279).

18317929 is an equidigital number, since it uses as much as digits as its factorization.

18317929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36935.

The product of its digits is 27216, while the sum is 40.

The square root of 18317929 is about 4279.9449762818. The cubic root of 18317929 is about 263.6081240209.

The spelling of 18317929 in words is "eighteen million, three hundred seventeen thousand, nine hundred twenty-nine".