18270487228 has 48 divisors (see below), whose sum is σ = 36750106624. Its totient is φ = 7785486720.

The previous prime is 18270487217. The next prime is 18270487243. The reversal of 18270487228 is 82278407281.

It is a happy number.

It is a super-2 number, since 2×18270487228² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7685176 + ... + 7687552.

Almost surely, 2^18270487228 is an apocalyptic number.

It is an amenable number.

18270487228 is an abundant number, since it is smaller than the sum of its proper divisors (18479619396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18270487228 is a wasteful number, since it uses less digits than its factorization.

18270487228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842 (or 3840 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 49.

The spelling of 18270487228 in words is "eighteen billion, two hundred seventy million, four hundred eighty-seven thousand, two hundred twenty-eight".