18370145 has 4 divisors (see below), whose sum is σ = 22044180. Its totient is φ = 14696112.

The previous prime is 18370133. The next prime is 18370147. The reversal of 18370145 is 54107381.

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 11235904 + 7134241 = 3352^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 18370145 - 2¹⁸ = 18108001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18370147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1837010 + ... + 1837019.

It is an arithmetic number, because the mean of its divisors is an integer number (5511045).

Almost surely, 2^18370145 is an apocalyptic number.

It is an amenable number.

18370145 is a deficient number, since it is larger than the sum of its proper divisors (3674035).

18370145 is an equidigital number, since it uses as much as digits as its factorization.

18370145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674034.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 18370145 is about 4286.0407137590. The cubic root of 18370145 is about 263.8583616190.

The spelling of 18370145 in words is "eighteen million, three hundred seventy thousand, one hundred forty-five".