18080347 has 4 divisors (see below), whose sum is σ = 18663616. Its totient is φ = 17497080.

The previous prime is 18080329. The next prime is 18080351. The reversal of 18080347 is 74308081.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18080347 - 2¹⁹ = 17556059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 583237 = 18080347 / (1 + 8 + 0 + 8 + 0 + 3 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18080327) 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 3 ways as a sum of consecutive naturals, for example, 291588 + ... + 291649.

It is an arithmetic number, because the mean of its divisors is an integer number (4665904).

Almost surely, 2^18080347 is an apocalyptic number.

18080347 is a deficient number, since it is larger than the sum of its proper divisors (583269).

18080347 is an equidigital number, since it uses as much as digits as its factorization.

18080347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583268.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18080347 is about 4252.0991286657. The cubic root of 18080347 is about 262.4635027111.

The spelling of 18080347 in words is "eighteen million, eighty thousand, three hundred forty-seven".