18252994 has 4 divisors (see below), whose sum is σ = 27379494. Its totient is φ = 9126496.

The previous prime is 18252991. The next prime is 18253009. The reversal of 18252994 is 49925281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11309769 + 6943225 = 3363^2 + 2635^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18252991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4563247 + ... + 4563250.

Almost surely, 2^18252994 is an apocalyptic number.

18252994 is a deficient number, since it is larger than the sum of its proper divisors (9126500).

18252994 is an equidigital number, since it uses as much as digits as its factorization.

18252994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126499.

The product of its digits is 51840, while the sum is 40.

The square root of 18252994 is about 4272.3522794826. The cubic root of 18252994 is about 263.2962681724.

The spelling of 18252994 in words is "eighteen million, two hundred fifty-two thousand, nine hundred ninety-four".