18894047 has 8 divisors (see below), whose sum is σ = 19411392. Its totient is φ = 18381600.

The previous prime is 18894019. The next prime is 18894049. The reversal of 18894047 is 74049881.

It is a happy number.

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 18894047 - 2¹⁸ = 18631903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18893995 and 18894013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18894049) 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, 7397 + ... + 9617.

It is an arithmetic number, because the mean of its divisors is an integer number (2426424).

Almost surely, 2^18894047 is an apocalyptic number.

18894047 is a deficient number, since it is larger than the sum of its proper divisors (517345).

18894047 is a wasteful number, since it uses less digits than its factorization.

18894047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 18894047 is about 4346.7283098901. The cubic root of 18894047 is about 266.3432309589.

The spelling of 18894047 in words is "eighteen million, eight hundred ninety-four thousand, forty-seven".