18641794 has 8 divisors (see below), whose sum is σ = 28038780. Its totient is φ = 9295536.

The previous prime is 18641789. The next prime is 18641801. The reversal of 18641794 is 49714681.

It can be written as a sum of positive squares in 2 ways, for example, as 16040025 + 2601769 = 4005^2 + 1613^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11749 + ... + 13240.

Almost surely, 2^18641794 is an apocalyptic number.

18641794 is a deficient number, since it is larger than the sum of its proper divisors (9396986).

18641794 is a wasteful number, since it uses less digits than its factorization.

18641794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25364.

The product of its digits is 48384, while the sum is 40.

The square root of 18641794 is about 4317.6143875988. The cubic root of 18641794 is about 265.1526070097.

The spelling of 18641794 in words is "eighteen million, six hundred forty-one thousand, seven hundred ninety-four".