18216018203628 has 24 divisors (see below), whose sum is σ = 48576048543232. Its totient is φ = 5204576629584.

The previous prime is 18216018203623. The next prime is 18216018203689. The reversal of 18216018203628 is 82630281061281.

It is not an unprimeable number, because it can be changed into a prime (18216018203623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108428679700 + ... + 108428679867.

Almost surely, 2^{18216018203628} is an apocalyptic number.

It is an amenable number.

18216018203628 is an abundant number, since it is smaller than the sum of its proper divisors (30360030339604).

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

18216018203628 is a wasteful number, since it uses less digits than its factorization.

18216018203628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216857359581 (or 216857359579 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 18216018203628 in words is "eighteen trillion, two hundred sixteen billion, eighteen million, two hundred three thousand, six hundred twenty-eight".