18412493 has 8 divisors (see below), whose sum is σ = 20184096. Its totient is φ = 16657200.

The previous prime is 18412483. The next prime is 18412517. The reversal of 18412493 is 39421481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18412493 - 2⁸ = 18412237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18412483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1646 + ... + 6287.

It is an arithmetic number, because the mean of its divisors is an integer number (2523012).

Almost surely, 2^18412493 is an apocalyptic number.

It is an amenable number.

18412493 is a deficient number, since it is larger than the sum of its proper divisors (1771603).

18412493 is a wasteful number, since it uses less digits than its factorization.

18412493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8155.

The product of its digits is 6912, while the sum is 32.

The square root of 18412493 is about 4290.9780936285. The cubic root of 18412493 is about 264.0609602492.

It can be divided in two parts, 1841 and 2493, that added together give a palindrome (4334).

The spelling of 18412493 in words is "eighteen million, four hundred twelve thousand, four hundred ninety-three".