18197573 has 8 divisors (see below), whose sum is σ = 19297920. Its totient is φ = 17111520.

The previous prime is 18197567. The next prime is 18197579. The reversal of 18197573 is 37579181.

It is an interprime number because it is at equal distance from previous prime (18197567) and next prime (18197579).

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 18197573 - 2²⁴ = 1420357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18197573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18197579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893 + ... + 6098.

It is an arithmetic number, because the mean of its divisors is an integer number (2412240).

Almost surely, 2^18197573 is an apocalyptic number.

It is an amenable number.

18197573 is a deficient number, since it is larger than the sum of its proper divisors (1100347).

18197573 is a wasteful number, since it uses less digits than its factorization.

18197573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7147.

The product of its digits is 52920, while the sum is 41.

The square root of 18197573 is about 4265.8613432694. The cubic root of 18197573 is about 263.0295185824.

The spelling of 18197573 in words is "eighteen million, one hundred ninety-seven thousand, five hundred seventy-three".