6809018220 has 192 divisors, whose sum is σ = 22353408000. Its totient is φ = 1715945472.

The previous prime is 6809018197. The next prime is 6809018221. The reversal of 6809018220 is 228109086.

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

It is not an unprimeable number, because it can be changed into a prime (6809018221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7889509 + ... + 7890371.

It is an arithmetic number, because the mean of its divisors is an integer number (116424000).

Almost surely, 2^6809018220 is an apocalyptic number.

6809018220 is a gapful number since it is divisible by the number (60) 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 6809018220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11176704000).

6809018220 is an abundant number, since it is smaller than the sum of its proper divisors (15544389780).

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

6809018220 is a wasteful number, since it uses less digits than its factorization.

6809018220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669 (or 1661 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 6809018220 is about 82516.7753853724. The cubic root of 6809018220 is about 1895.3736213998.

The spelling of 6809018220 in words is "six billion, eight hundred nine million, eighteen thousand, two hundred twenty".