18610145 has 4 divisors (see below), whose sum is σ = 22332180. Its totient is φ = 14888112.

The previous prime is 18610133. The next prime is 18610181. The reversal of 18610145 is 54101681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54101681 = 23 ⋅2352247.

It can be written as a sum of positive squares in 2 ways, for example, as 4532641 + 14077504 = 2129^2 + 3752^2 .

It is a cyclic number.

It is not a de Polignac number, because 18610145 - 2¹⁶ = 18544609 is a prime.

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, 1861010 + ... + 1861019.

It is an arithmetic number, because the mean of its divisors is an integer number (5583045).

Almost surely, 2^18610145 is an apocalyptic number.

It is an amenable number.

18610145 is a deficient number, since it is larger than the sum of its proper divisors (3722035).

18610145 is an equidigital number, since it uses as much as digits as its factorization.

18610145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722034.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 18610145 is about 4313.9477280097. The cubic root of 18610145 is about 265.0024682338.

The spelling of 18610145 in words is "eighteen million, six hundred ten thousand, one hundred forty-five".