18252397 has 16 divisors (see below), whose sum is σ = 19814400. Its totient is φ = 16773120.

The previous prime is 18252391. The next prime is 18252401. The reversal of 18252397 is 79325281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18252397 is a prime.

It is a Duffinian number.

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 in 15 ways as a sum of consecutive naturals, for example, 70893 + ... + 71149.

It is an arithmetic number, because the mean of its divisors is an integer number (1238400).

Almost surely, 2^18252397 is an apocalyptic number.

It is an amenable number.

18252397 is a deficient number, since it is larger than the sum of its proper divisors (1562003).

18252397 is a wasteful number, since it uses less digits than its factorization.

18252397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its digits is 30240, while the sum is 37.

The square root of 18252397 is about 4272.2824110772. The cubic root of 18252397 is about 263.2933976007.

The spelling of 18252397 in words is "eighteen million, two hundred fifty-two thousand, three hundred ninety-seven".