18825897 has 32 divisors (see below), whose sum is σ = 27279360. Its totient is φ = 11525760.

The previous prime is 18825887. The next prime is 18825899. The reversal of 18825897 is 79852881.

It is not a de Polignac number, because 18825897 - 2⁷ = 18825769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18825899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257853 + ... + 257925.

It is an arithmetic number, because the mean of its divisors is an integer number (852480).

Almost surely, 2^18825897 is an apocalyptic number.

It is an amenable number.

18825897 is a deficient number, since it is larger than the sum of its proper divisors (8453463).

18825897 is a wasteful number, since it uses less digits than its factorization.

18825897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213.

The product of its digits is 322560, while the sum is 48.

The square root of 18825897 is about 4338.8819988564. The cubic root of 18825897 is about 266.0226157114.

The spelling of 18825897 in words is "eighteen million, eight hundred twenty-five thousand, eight hundred ninety-seven".