11867821063 has 4 divisors (see below), whose sum is σ = 13563224080. Its totient is φ = 10172418048.

The previous prime is 11867821033. The next prime is 11867821081. The reversal of 11867821063 is 36012876811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36012876811 = 19 ⋅1895414569.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11867821063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11867821013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847701498 + ... + 847701511.

It is an arithmetic number, because the mean of its divisors is an integer number (3390806020).

Almost surely, 2^11867821063 is an apocalyptic number.

11867821063 is a deficient number, since it is larger than the sum of its proper divisors (1695403017).

11867821063 is an equidigital number, since it uses as much as digits as its factorization.

11867821063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695403016.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 11867821063 in words is "eleven billion, eight hundred sixty-seven million, eight hundred twenty-one thousand, sixty-three".