18242600197 has 4 divisors (see below), whose sum is σ = 18250883200. Its totient is φ = 18234317196.

The previous prime is 18242600179. The next prime is 18242600267. The reversal of 18242600197 is 79100624281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18242600197 - 2¹⁹ = 18242075909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18242600177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4138197 + ... + 4142602.

It is an arithmetic number, because the mean of its divisors is an integer number (4562720800).

Almost surely, 2^18242600197 is an apocalyptic number.

It is an amenable number.

18242600197 is a deficient number, since it is larger than the sum of its proper divisors (8283003).

18242600197 is an equidigital number, since it uses as much as digits as its factorization.

18242600197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8283002.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 18242600197 in words is "eighteen billion, two hundred forty-two million, six hundred thousand, one hundred ninety-seven".