18817243822 has 12 divisors (see below), whose sum is σ = 30564103680. Its totient is φ = 8684881608.

The previous prime is 18817243817. The next prime is 18817243829. The reversal of 18817243822 is 22834271881.

It is a happy number.

It is a super-3 number, since 3×18817243822³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18817243829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27835822 + ... + 27836497.

It is an arithmetic number, because the mean of its divisors is an integer number (2547008640).

Almost surely, 2^18817243822 is an apocalyptic number.

18817243822 is a deficient number, since it is larger than the sum of its proper divisors (11746859858).

18817243822 is a wasteful number, since it uses less digits than its factorization.

18817243822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55672347 (or 55672334 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The spelling of 18817243822 in words is "eighteen billion, eight hundred seventeen million, two hundred forty-three thousand, eight hundred twenty-two".