18643711822268 has 12 divisors (see below), whose sum is σ = 35136226126680. Its totient is φ = 8604790071792.

The previous prime is 18643711822259. The next prime is 18643711822283. The reversal of 18643711822268 is 86222811734681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179266459778 + ... + 179266459881.

It is an arithmetic number, because the mean of its divisors is an integer number (2928018843890).

Almost surely, 2^{18643711822268} is an apocalyptic number.

It is an amenable number.

18643711822268 is a deficient number, since it is larger than the sum of its proper divisors (16492514304412).

18643711822268 is a wasteful number, since it uses less digits than its factorization.

18643711822268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358532919676 (or 358532919674 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 59.

The spelling of 18643711822268 in words is "eighteen trillion, six hundred forty-three billion, seven hundred eleven million, eight hundred twenty-two thousand, two hundred sixty-eight".