18817342429 has 8 divisors (see below), whose sum is σ = 19721237760. Its totient is φ = 17920592976.

The previous prime is 18817342393. The next prime is 18817342447. The reversal of 18817342429 is 92424371881.

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 18817342429 - 2⁷ = 18817342301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18817342469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1781077 + ... + 1791610.

It is an arithmetic number, because the mean of its divisors is an integer number (2465154720).

Almost surely, 2^18817342429 is an apocalyptic number.

It is an amenable number.

18817342429 is a deficient number, since it is larger than the sum of its proper divisors (903895331).

18817342429 is a wasteful number, since it uses less digits than its factorization.

18817342429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572939.

The product of its digits is 774144, while the sum is 49.

The spelling of 18817342429 in words is "eighteen billion, eight hundred seventeen million, three hundred forty-two thousand, four hundred twenty-nine".