18894110220 has 144 divisors (see below), whose sum is σ = 59509151520. Its totient is φ = 5032129536.

The previous prime is 18894110159. The next prime is 18894110239. The reversal of 18894110220 is 2201149881.

It is a happy number.

18894110220 is a `hidden beast` number, since 18 + 8 + 9 + 411 + 0 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4901814 + ... + 4905666.

Almost surely, 2^18894110220 is an apocalyptic number.

18894110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18894110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29754575760).

18894110220 is an abundant number, since it is smaller than the sum of its proper divisors (40615041300).

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

18894110220 is a wasteful number, since it uses less digits than its factorization.

18894110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886 (or 4872 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 18894110220 in words is "eighteen billion, eight hundred ninety-four million, one hundred ten thousand, two hundred twenty".