18894089 has 8 divisors (see below), whose sum is σ = 20049408. Its totient is φ = 17743680.

The previous prime is 18894049. The next prime is 18894091. The reversal of 18894089 is 98049881.

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 18894089 - 2¹² = 18889993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18894019) 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, 9404 + ... + 11234.

It is an arithmetic number, because the mean of its divisors is an integer number (2506176).

Almost surely, 2^18894089 is an apocalyptic number.

It is an amenable number.

18894089 is a deficient number, since it is larger than the sum of its proper divisors (1155319).

18894089 is a wasteful number, since it uses less digits than its factorization.

18894089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 18894089 is about 4346.7331411072. The cubic root of 18894089 is about 266.3434283122.

The spelling of 18894089 in words is "eighteen million, eight hundred ninety-four thousand, eighty-nine".