11687018219 has 2 divisors, whose sum is σ = 11687018220. Its totient is φ = 11687018218.

The previous prime is 11687018191. The next prime is 11687018263. The reversal of 11687018219 is 91281078611.

It is a happy number.

It is an a-pointer prime, because the next prime (11687018263) can be obtained adding 11687018219 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11687018219 is a prime.

It is a super-2 number, since 2×11687018219² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11687018219.

It is not a weakly prime, because it can be changed into another prime (11687018269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5843509109 + 5843509110.

It is an arithmetic number, because the mean of its divisors is an integer number (5843509110).

Almost surely, 2^11687018219 is an apocalyptic number.

11687018219 is a deficient number, since it is larger than the sum of its proper divisors (1).

11687018219 is an equidigital number, since it uses as much as digits as its factorization.

11687018219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 44.

The spelling of 11687018219 in words is "eleven billion, six hundred eighty-seven million, eighteen thousand, two hundred nineteen".