18245649 has 16 divisors (see below), whose sum is σ = 24909120. Its totient is φ = 11876160.

The previous prime is 18245629. The next prime is 18245653. The reversal of 18245649 is 94654281.

It is not a de Polignac number, because 18245649 - 2⁸ = 18245393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18245609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32479 + ... + 33035.

It is an arithmetic number, because the mean of its divisors is an integer number (1556820).

Almost surely, 2^18245649 is an apocalyptic number.

It is an amenable number.

18245649 is a deficient number, since it is larger than the sum of its proper divisors (6663471).

18245649 is a wasteful number, since it uses less digits than its factorization.

18245649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800.

The product of its digits is 69120, while the sum is 39.

The square root of 18245649 is about 4271.4925962712. The cubic root of 18245649 is about 263.2609466511.

The spelling of 18245649 in words is "eighteen million, two hundred forty-five thousand, six hundred forty-nine".