12018439677 has 4 divisors (see below), whose sum is σ = 16024586240. Its totient is φ = 8012293116.

The previous prime is 12018439673. The next prime is 12018439679. The reversal of 12018439677 is 77693481021.

It is a happy number.

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 12018439677 - 2² = 12018439673 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 (12018439673) 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, 2003073277 + ... + 2003073282.

It is an arithmetic number, because the mean of its divisors is an integer number (4006146560).

Almost surely, 2^12018439677 is an apocalyptic number.

It is an amenable number.

12018439677 is a deficient number, since it is larger than the sum of its proper divisors (4006146563).

12018439677 is an equidigital number, since it uses as much as digits as its factorization.

12018439677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006146562.

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 12018439677 in words is "twelve billion, eighteen million, four hundred thirty-nine thousand, six hundred seventy-seven".