20218908833208 has 256 divisors, whose sum is σ = 60337405440000. Its totient is φ = 6250480588800.

The previous prime is 20218908833183. The next prime is 20218908833213. The reversal of 20218908833208 is 80233880981202.

It is a happy number.

20218908833208 is a `hidden beast` number, since 2 + 0 + 218 + 90 + 8 + 8 + 332 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 508107793 + ... + 508147583.

It is an arithmetic number, because the mean of its divisors is an integer number (235692990000).

Almost surely, 2^{20218908833208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20218908833208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30168702720000).

20218908833208 is an abundant number, since it is smaller than the sum of its proper divisors (40118496606792).

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

20218908833208 is a wasteful number, since it uses less digits than its factorization.

20218908833208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41843 (or 41833 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 20218908833208 in words is "twenty trillion, two hundred eighteen billion, nine hundred eight million, eight hundred thirty-three thousand, two hundred eight".