12247840389 has 4 divisors (see below), whose sum is σ = 16330453856. Its totient is φ = 8165226924.

The previous prime is 12247840369. The next prime is 12247840391. The reversal of 12247840389 is 98304874221.

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 12247840389 - 2⁵ = 12247840357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12247840369) 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, 2041306729 + ... + 2041306734.

It is an arithmetic number, because the mean of its divisors is an integer number (4082613464).

Almost surely, 2^12247840389 is an apocalyptic number.

It is an amenable number.

12247840389 is a deficient number, since it is larger than the sum of its proper divisors (4082613467).

12247840389 is an equidigital number, since it uses as much as digits as its factorization.

12247840389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082613466.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 12247840389 in words is "twelve billion, two hundred forty-seven million, eight hundred forty thousand, three hundred eighty-nine".