18227197100 has 72 divisors (see below), whose sum is σ = 46661680128. Its totient is φ = 6047726400.

The previous prime is 18227197057. The next prime is 18227197147. The reversal of 18227197100 is 179172281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398282 + ... + 441681.

Almost surely, 2^18227197100 is an apocalyptic number.

18227197100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18227197100 is an abundant number, since it is smaller than the sum of its proper divisors (28434483028).

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

18227197100 is a wasteful number, since it uses less digits than its factorization.

18227197100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840015 (or 840008 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 38.

The spelling of 18227197100 in words is "eighteen billion, two hundred twenty-seven million, one hundred ninety-seven thousand, one hundred".