18317429 has 4 divisors (see below), whose sum is σ = 19726476. Its totient is φ = 16908384.

The previous prime is 18317419. The next prime is 18317471. The reversal of 18317429 is 92471381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12567025 + 5750404 = 3545^2 + 2398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18317429 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 (18317419) 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 3 ways as a sum of consecutive naturals, for example, 704504 + ... + 704529.

It is an arithmetic number, because the mean of its divisors is an integer number (4931619).

Almost surely, 2^18317429 is an apocalyptic number.

It is an amenable number.

18317429 is a deficient number, since it is larger than the sum of its proper divisors (1409047).

18317429 is a wasteful number, since it uses less digits than its factorization.

18317429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409046.

The product of its digits is 12096, while the sum is 35.

The square root of 18317429 is about 4279.8865639173. The cubic root of 18317429 is about 263.6057255463.

The spelling of 18317429 in words is "eighteen million, three hundred seventeen thousand, four hundred twenty-nine".