12190718409 has 4 divisors (see below), whose sum is σ = 16254291216. Its totient is φ = 8127145604.

The previous prime is 12190718369. The next prime is 12190718413. The reversal of 12190718409 is 90481709121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90481709121 = 3 ⋅30160569707.

It is a cyclic number.

It is not a de Polignac number, because 12190718409 - 2¹¹ = 12190716361 is a prime.

It is a super-2 number, since 2×12190718409² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12190718489) 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, 2031786399 + ... + 2031786404.

It is an arithmetic number, because the mean of its divisors is an integer number (4063572804).

Almost surely, 2^12190718409 is an apocalyptic number.

It is an amenable number.

12190718409 is a deficient number, since it is larger than the sum of its proper divisors (4063572807).

12190718409 is an equidigital number, since it uses as much as digits as its factorization.

12190718409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063572806.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 12190718409 in words is "twelve billion, one hundred ninety million, seven hundred eighteen thousand, four hundred nine".