18830917 has 8 divisors (see below), whose sum is σ = 22787136. Its totient is φ = 15191232.

The previous prime is 18830897. The next prime is 18830939. The reversal of 18830917 is 71903881.

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

It is a de Polignac number, because none of the positive numbers 2^k-18830917 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 (18839917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79003 + ... + 79240.

It is an arithmetic number, because the mean of its divisors is an integer number (2848392).

Almost surely, 2^18830917 is an apocalyptic number.

18830917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18830917 is a deficient number, since it is larger than the sum of its proper divisors (3956219).

18830917 is a wasteful number, since it uses less digits than its factorization.

18830917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158267.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 18830917 is about 4339.4604503325. The cubic root of 18830917 is about 266.0462589381.

The spelling of 18830917 in words is "eighteen million, eight hundred thirty thousand, nine hundred seventeen".