18645441 has 16 divisors (see below), whose sum is σ = 26533440. Its totient is φ = 11612160.

The previous prime is 18645439. The next prime is 18645449. The reversal of 18645441 is 14454681.

It is not a de Polignac number, because 18645441 - 2¹ = 18645439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18645449) 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, 1921 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (1658340).

Almost surely, 2^18645441 is an apocalyptic number.

It is an amenable number.

18645441 is a deficient number, since it is larger than the sum of its proper divisors (7887999).

18645441 is a wasteful number, since it uses less digits than its factorization.

18645441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576.

The product of its digits is 15360, while the sum is 33.

The square root of 18645441 is about 4318.0367066527. The cubic root of 18645441 is about 265.1698969856.

The spelling of 18645441 in words is "eighteen million, six hundred forty-five thousand, four hundred forty-one".