18894057 has 24 divisors (see below), whose sum is σ = 31562496. Its totient is φ = 9965088.

The previous prime is 18894049. The next prime is 18894091. The reversal of 18894057 is 75049881.

It is not a de Polignac number, because 18894057 - 2³ = 18894049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18894857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3033 + ... + 6854.

It is an arithmetic number, because the mean of its divisors is an integer number (1315104).

Almost surely, 2^18894057 is an apocalyptic number.

It is an amenable number.

18894057 is a deficient number, since it is larger than the sum of its proper divisors (12668439).

18894057 is a wasteful number, since it uses less digits than its factorization.

18894057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9917 (or 9910 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 18894057 is about 4346.7294601804. The cubic root of 18894057 is about 266.3432779478.

The spelling of 18894057 in words is "eighteen million, eight hundred ninety-four thousand, fifty-seven".