11518916923 has 4 divisors (see below), whose sum is σ = 11830239040. Its totient is φ = 11207594808.

The previous prime is 11518916917. The next prime is 11518916939. The reversal of 11518916923 is 32961981511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32961981511 = 5843 ⋅5641277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11518916923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11518916963) 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, 155661003 + ... + 155661076.

It is an arithmetic number, because the mean of its divisors is an integer number (2957559760).

Almost surely, 2^11518916923 is an apocalyptic number.

11518916923 is a deficient number, since it is larger than the sum of its proper divisors (311322117).

11518916923 is an equidigital number, since it uses as much as digits as its factorization.

11518916923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311322116.

The product of its digits is 116640, while the sum is 46.

The spelling of 11518916923 in words is "eleven billion, five hundred eighteen million, nine hundred sixteen thousand, nine hundred twenty-three".