18023045 has 4 divisors (see below), whose sum is σ = 21627660. Its totient is φ = 14418432.

The previous prime is 18023029. The next prime is 18023051. The reversal of 18023045 is 54032081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3407716 + 14615329 = 1846^2 + 3823^2 .

It is a cyclic number.

It is not a de Polignac number, because 18023045 - 2⁴ = 18023029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18023045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802300 + ... + 1802309.

It is an arithmetic number, because the mean of its divisors is an integer number (5406915).

Almost surely, 2^18023045 is an apocalyptic number.

It is an amenable number.

18023045 is a deficient number, since it is larger than the sum of its proper divisors (3604615).

18023045 is an equidigital number, since it uses as much as digits as its factorization.

18023045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604614.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18023045 is about 4245.3556977007. The cubic root of 18023045 is about 262.1859342906.

The spelling of 18023045 in words is "eighteen million, twenty-three thousand, forty-five".