18252398 has 4 divisors (see below), whose sum is σ = 27378600. Its totient is φ = 9126198.

The previous prime is 18252391. The next prime is 18252401. The reversal of 18252398 is 89325281.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18252391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4563098 + ... + 4563101.

It is an arithmetic number, because the mean of its divisors is an integer number (6844650).

Almost surely, 2^18252398 is an apocalyptic number.

18252398 is a deficient number, since it is larger than the sum of its proper divisors (9126202).

18252398 is an equidigital number, since it uses as much as digits as its factorization.

18252398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126201.

The product of its digits is 34560, while the sum is 38.

The square root of 18252398 is about 4272.2825281107. The cubic root of 18252398 is about 263.2934024091.

The spelling of 18252398 in words is "eighteen million, two hundred fifty-two thousand, three hundred ninety-eight".