12013267987 has 4 divisors (see below), whose sum is σ = 13729449136. Its totient is φ = 10297086840.

The previous prime is 12013267961. The next prime is 12013268021. The reversal of 12013267987 is 78976231021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12013267987 - 2⁷ = 12013267859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12013267927) 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, 858090564 + ... + 858090577.

It is an arithmetic number, because the mean of its divisors is an integer number (3432362284).

Almost surely, 2^12013267987 is an apocalyptic number.

12013267987 is a deficient number, since it is larger than the sum of its proper divisors (1716181149).

12013267987 is an equidigital number, since it uses as much as digits as its factorization.

12013267987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716181148.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 12013267987 in words is "twelve billion, thirteen million, two hundred sixty-seven thousand, nine hundred eighty-seven".