18091194213 has 4 divisors (see below), whose sum is σ = 24121592288. Its totient is φ = 12060796140.

The previous prime is 18091194193. The next prime is 18091194301. The reversal of 18091194213 is 31249119081.

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 not a de Polignac number, because 18091194213 - 2¹⁷ = 18091063141 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 (18091190213) 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, 3015199033 + ... + 3015199038.

It is an arithmetic number, because the mean of its divisors is an integer number (6030398072).

Almost surely, 2^18091194213 is an apocalyptic number.

It is an amenable number.

18091194213 is a deficient number, since it is larger than the sum of its proper divisors (6030398075).

18091194213 is an equidigital number, since it uses as much as digits as its factorization.

18091194213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030398074.

The product of its (nonzero) digits is 15552, while the sum is 39.

The spelling of 18091194213 in words is "eighteen billion, ninety-one million, one hundred ninety-four thousand, two hundred thirteen".