18880317 has 8 divisors (see below), whose sum is σ = 27970880. Its totient is φ = 12586860.

The previous prime is 18880313. The next prime is 18880321. The reversal of 18880317 is 71308881.

It is an interprime number because it is at equal distance from previous prime (18880313) and next prime (18880321).

It is not a de Polignac number, because 18880317 - 2² = 18880313 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 (18880313) 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, 349609 + ... + 349662.

It is an arithmetic number, because the mean of its divisors is an integer number (3496360).

Almost surely, 2^18880317 is an apocalyptic number.

It is an amenable number.

18880317 is a deficient number, since it is larger than the sum of its proper divisors (9090563).

18880317 is an equidigital number, since it uses as much as digits as its factorization.

18880317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699280 (or 699274 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 18880317 is about 4345.1486740962. The cubic root of 18880317 is about 266.2786995447.

The spelling of 18880317 in words is "eighteen million, eight hundred eighty thousand, three hundred seventeen".