18232645 has 16 divisors (see below), whose sum is σ = 22587840. Its totient is φ = 14120064.

The previous prime is 18232637. The next prime is 18232649. The reversal of 18232645 is 54623281.

It is a cyclic number.

It is not a de Polignac number, because 18232645 - 2³ = 18232637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232649) 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, 29146 + ... + 29764.

It is an arithmetic number, because the mean of its divisors is an integer number (1411740).

Almost surely, 2^18232645 is an apocalyptic number.

It is an amenable number.

18232645 is a deficient number, since it is larger than the sum of its proper divisors (4355195).

18232645 is a wasteful number, since it uses less digits than its factorization.

18232645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its digits is 11520, while the sum is 31.

The square root of 18232645 is about 4269.9701404108. The cubic root of 18232645 is about 263.1983881933.

The spelling of 18232645 in words is "eighteen million, two hundred thirty-two thousand, six hundred forty-five".