18674641 has 8 divisors (see below), whose sum is σ = 19010600. Its totient is φ = 18340992.

The previous prime is 18674627. The next prime is 18674657. The reversal of 18674641 is 14647681.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10857025 + 7817616 = 3295^2 + 2796^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18674641 - 2⁹ = 18674129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18674641.

It is not an unprimeable number, because it can be changed into a prime (18674671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25111 + ... + 25843.

It is an arithmetic number, because the mean of its divisors is an integer number (2376325).

Almost surely, 2^18674641 is an apocalyptic number.

It is an amenable number.

18674641 is a deficient number, since it is larger than the sum of its proper divisors (335959).

18674641 is an equidigital number, since it uses as much as digits as its factorization.

18674641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155.

The product of its digits is 32256, while the sum is 37.

The square root of 18674641 is about 4321.4165501604. The cubic root of 18674641 is about 265.3082493493.

The spelling of 18674641 in words is "eighteen million, six hundred seventy-four thousand, six hundred forty-one".