18945345 has 16 divisors (see below), whose sum is σ = 30381120. Its totient is φ = 10081344.

The previous prime is 18945343. The next prime is 18945349. The reversal of 18945345 is 54354981.

It is not a de Polignac number, because 18945345 - 2¹ = 18945343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18945343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7051 + ... + 9359.

It is an arithmetic number, because the mean of its divisors is an integer number (1898820).

Almost surely, 2^18945345 is an apocalyptic number.

18945345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18945345 is a deficient number, since it is larger than the sum of its proper divisors (11435775).

18945345 is a wasteful number, since it uses less digits than its factorization.

18945345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864.

The product of its digits is 86400, while the sum is 39.

The square root of 18945345 is about 4352.6250700009. The cubic root of 18945345 is about 266.5840568765.

The spelling of 18945345 in words is "eighteen million, nine hundred forty-five thousand, three hundred forty-five".