18688855002220 has 48 divisors (see below), whose sum is σ = 44103197638080. Its totient is φ = 6600478553856.

The previous prime is 18688855002163. The next prime is 18688855002229. The reversal of 18688855002220 is 2220055888681.

It is not an unprimeable number, because it can be changed into a prime (18688855002229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562607315 + ... + 1562619274.

It is an arithmetic number, because the mean of its divisors is an integer number (918816617460).

Almost surely, 2^{18688855002220} is an apocalyptic number.

18688855002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18688855002220 is an abundant number, since it is smaller than the sum of its proper divisors (25414342635860).

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

18688855002220 is a wasteful number, since it uses less digits than its factorization.

18688855002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125226634 (or 3125226632 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 55.

The spelling of 18688855002220 in words is "eighteen trillion, six hundred eighty-eight billion, eight hundred fifty-five million, two thousand, two hundred twenty".