18641349 has 6 divisors (see below), whose sum is σ = 26926406. Its totient is φ = 12427560.

The previous prime is 18641327. The next prime is 18641351. The reversal of 18641349 is 94314681.

18641349 is a `hidden beast` number, since 1 + 8 + 641 + 3 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11512449 + 7128900 = 3393^2 + 2670^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18641349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18641309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1035622 + ... + 1035639.

Almost surely, 2^18641349 is an apocalyptic number.

It is an amenable number.

18641349 is a deficient number, since it is larger than the sum of its proper divisors (8285057).

18641349 is a wasteful number, since it uses less digits than its factorization.

18641349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071267 (or 2071264 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18641349 is about 4317.5628542037. The cubic root of 18641349 is about 265.1504971654.

The spelling of 18641349 in words is "eighteen million, six hundred forty-one thousand, three hundred forty-nine".