18302945 has 8 divisors (see below), whose sum is σ = 22004136. Its totient is φ = 14615296.

The previous prime is 18302923. The next prime is 18302951. The reversal of 18302945 is 54920381.

It can be written as a sum of positive squares in 4 ways, for example, as 18769 + 18284176 = 137^2 + 4276^2 .

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 18302945 - 2⁸ = 18302689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 122 + ... + 6051.

It is an arithmetic number, because the mean of its divisors is an integer number (2750517).

Almost surely, 2^18302945 is an apocalyptic number.

It is an amenable number.

18302945 is a deficient number, since it is larger than the sum of its proper divisors (3701191).

18302945 is an equidigital number, since it uses as much as digits as its factorization.

18302945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18302945 is about 4278.1941283677. The cubic root of 18302945 is about 263.5362275814.

The spelling of 18302945 in words is "eighteen million, three hundred two thousand, nine hundred forty-five".