18430293 has 16 divisors (see below), whose sum is σ = 28505600. Its totient is φ = 10373616.

The previous prime is 18430289. The next prime is 18430301. The reversal of 18430293 is 39203481.

It is not a de Polignac number, because 18430293 - 2² = 18430289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18430293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18430493) 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, 5143 + ... + 7956.

It is an arithmetic number, because the mean of its divisors is an integer number (1781600).

Almost surely, 2^18430293 is an apocalyptic number.

It is an amenable number.

18430293 is a deficient number, since it is larger than the sum of its proper divisors (10075307).

18430293 is a wasteful number, since it uses less digits than its factorization.

18430293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13176.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 18430293 is about 4293.0517117780. The cubic root of 18430293 is about 264.1460251607.

The spelling of 18430293 in words is "eighteen million, four hundred thirty thousand, two hundred ninety-three".