6420218600 has 96 divisors (see below), whose sum is σ = 15418845720. Its totient is φ = 2484817920.

The previous prime is 6420218599. The next prime is 6420218603. The reversal of 6420218600 is 68120246.

It can be written as a sum of positive squares in 12 ways, for example, as 2969596036 + 3450622564 = 54494^2 + 58742^2 .

It is not an unprimeable number, because it can be changed into a prime (6420218603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 769652 + ... + 777948.

Almost surely, 2^6420218600 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 6420218600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7709422860).

6420218600 is an abundant number, since it is smaller than the sum of its proper divisors (8998627120).

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

6420218600 is a wasteful number, since it uses less digits than its factorization.

6420218600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8439 (or 8430 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 6420218600 is about 80126.2666046534. The cubic root of 6420218600 is about 1858.5886121096.

Adding to 6420218600 its reverse (68120246), we get a palindrome (6488338846).

The spelling of 6420218600 in words is "six billion, four hundred twenty million, two hundred eighteen thousand, six hundred".