18123623228 has 12 divisors (see below), whose sum is σ = 33582007872. Its totient is φ = 8528763840.

The previous prime is 18123623227. The next prime is 18123623249. The reversal of 18123623228 is 82232632181.

It is a super-2 number, since 2×18123623228² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18123623191 and 18123623200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18123623227) 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, 133261868 + ... + 133262003.

It is an arithmetic number, because the mean of its divisors is an integer number (2798500656).

Almost surely, 2^18123623228 is an apocalyptic number.

It is an amenable number.

18123623228 is a deficient number, since it is larger than the sum of its proper divisors (15458384644).

18123623228 is a wasteful number, since it uses less digits than its factorization.

18123623228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266523892 (or 266523890 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The spelling of 18123623228 in words is "eighteen billion, one hundred twenty-three million, six hundred twenty-three thousand, two hundred twenty-eight".