18421246 has 8 divisors (see below), whose sum is σ = 27740160. Its totient is φ = 9174528.

The previous prime is 18421237. The next prime is 18421297. The reversal of 18421246 is 64212481.

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

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, 17406 + ... + 18433.

It is an arithmetic number, because the mean of its divisors is an integer number (3467520).

Almost surely, 2^18421246 is an apocalyptic number.

18421246 is a deficient number, since it is larger than the sum of its proper divisors (9318914).

18421246 is a wasteful number, since it uses less digits than its factorization.

18421246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36098.

The product of its digits is 3072, while the sum is 28.

The square root of 18421246 is about 4291.9979030750. The cubic root of 18421246 is about 264.1027970504.

The spelling of 18421246 in words is "eighteen million, four hundred twenty-one thousand, two hundred forty-six".