20812818600 has 864 divisors, whose sum is σ = 86003424000. Its totient is φ = 4491002880.

The previous prime is 20812818577. The next prime is 20812818613. The reversal of 20812818600 is 681821802.

20812818600 is a `hidden beast` number, since 20 + 8 + 1 + 28 + 1 + 8 + 600 = 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 215 ways as a sum of consecutive naturals, for example, 202066149 + ... + 202066251.

It is an arithmetic number, because the mean of its divisors is an integer number (99541000).

Almost surely, 2^20812818600 is an apocalyptic number.

20812818600 is a gapful number since it is divisible by the number (20) 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 20812818600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43001712000).

20812818600 is an abundant number, since it is smaller than the sum of its proper divisors (65190605400).

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

20812818600 is a wasteful number, since it uses less digits than its factorization.

20812818600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 20812818600 in words is "twenty billion, eight hundred twelve million, eight hundred eighteen thousand, six hundred".