12019996587 has 4 divisors (see below), whose sum is σ = 16026662120. Its totient is φ = 8013331056.

The previous prime is 12019996561. The next prime is 12019996633. The reversal of 12019996587 is 78569991021.

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

It is not a de Polignac number, because 12019996587 - 2¹⁰ = 12019995563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12019996507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2003332762 + ... + 2003332767.

It is an arithmetic number, because the mean of its divisors is an integer number (4006665530).

Almost surely, 2^12019996587 is an apocalyptic number.

12019996587 is a deficient number, since it is larger than the sum of its proper divisors (4006665533).

12019996587 is an equidigital number, since it uses as much as digits as its factorization.

12019996587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006665532.

The product of its (nonzero) digits is 2449440, while the sum is 57.

The spelling of 12019996587 in words is "twelve billion, nineteen million, nine hundred ninety-six thousand, five hundred eighty-seven".