18249470 has 8 divisors (see below), whose sum is σ = 32849064. Its totient is φ = 7299784.

The previous prime is 18249463. The next prime is 18249487. The reversal of 18249470 is 7494281.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18249470.

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, 912464 + ... + 912483.

It is an arithmetic number, because the mean of its divisors is an integer number (4106133).

Almost surely, 2^18249470 is an apocalyptic number.

18249470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18249470 is a deficient number, since it is larger than the sum of its proper divisors (14599594).

18249470 is a wasteful number, since it uses less digits than its factorization.

18249470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824954.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18249470 is about 4271.9398404004. The cubic root of 18249470 is about 263.2793227192.

The spelling of 18249470 in words is "eighteen million, two hundred forty-nine thousand, four hundred seventy".