18705134228 has 12 divisors (see below), whose sum is σ = 35709801792. Its totient is φ = 8502333720.

The previous prime is 18705134219. The next prime is 18705134251. The reversal of 18705134228 is 82243150781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212558300 + ... + 212558387.

It is an arithmetic number, because the mean of its divisors is an integer number (2975816816).

Almost surely, 2^18705134228 is an apocalyptic number.

It is an amenable number.

18705134228 is a deficient number, since it is larger than the sum of its proper divisors (17004667564).

18705134228 is a wasteful number, since it uses less digits than its factorization.

18705134228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425116702 (or 425116700 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 18705134228 in words is "eighteen billion, seven hundred five million, one hundred thirty-four thousand, two hundred twenty-eight".