18548446228 has 48 divisors (see below), whose sum is σ = 36816373440. Its totient is φ = 8105875200.

The previous prime is 18548446193. The next prime is 18548446237. The reversal of 18548446228 is 82264484581.

It is a happy number.

It is a super-3 number, since 3×18548446228³ (a number of 32 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2407863 + ... + 2415553.

It is an arithmetic number, because the mean of its divisors is an integer number (767007780).

Almost surely, 2^18548446228 is an apocalyptic number.

It is an amenable number.

18548446228 is a deficient number, since it is larger than the sum of its proper divisors (18267927212).

18548446228 is a wasteful number, since it uses less digits than its factorization.

18548446228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10168 (or 10166 counting only the distinct ones).

The product of its digits is 3932160, while the sum is 52.

The spelling of 18548446228 in words is "eighteen billion, five hundred forty-eight million, four hundred forty-six thousand, two hundred twenty-eight".