18225897 has 8 divisors (see below), whose sum is σ = 24493056. Its totient is φ = 12054672.

The previous prime is 18225869. The next prime is 18225917. The reversal of 18225897 is 79852281.

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

It is not a de Polignac number, because 18225897 - 2¹⁵ = 18193129 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18225847) 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, 23538 + ... + 24299.

It is an arithmetic number, because the mean of its divisors is an integer number (3061632).

Almost surely, 2^18225897 is an apocalyptic number.

It is an amenable number.

18225897 is a deficient number, since it is larger than the sum of its proper divisors (6267159).

18225897 is a wasteful number, since it uses less digits than its factorization.

18225897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47967.

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

The square root of 18225897 is about 4269.1798978258. The cubic root of 18225897 is about 263.1659138069.

The spelling of 18225897 in words is "eighteen million, two hundred twenty-five thousand, eight hundred ninety-seven".