18025645 has 8 divisors (see below), whose sum is σ = 23597280. Its totient is φ = 13109520.

The previous prime is 18025639. The next prime is 18025649. The reversal of 18025645 is 54652081.

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

It is not a de Polignac number, because 18025645 - 2⁷ = 18025517 is a prime.

It is a super-3 number, since 3×18025645³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025649) 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 7 ways as a sum of consecutive naturals, for example, 163815 + ... + 163924.

It is an arithmetic number, because the mean of its divisors is an integer number (2949660).

Almost surely, 2^18025645 is an apocalyptic number.

It is an amenable number.

18025645 is a deficient number, since it is larger than the sum of its proper divisors (5571635).

18025645 is a wasteful number, since it uses less digits than its factorization.

18025645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327755.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 18025645 is about 4245.6619036376. The cubic root of 18025645 is about 262.1985413103.

It can be divided in two parts, 1802 and 5645, that added together give a palindrome (7447).

The spelling of 18025645 in words is "eighteen million, twenty-five thousand, six hundred forty-five".