6329999820 has 96 divisors (see below), whose sum is σ = 17987558400. Its totient is φ = 1662994944.

The previous prime is 6329999807. The next prime is 6329999821. The reversal of 6329999820 is 289999236.

It is not an unprimeable number, because it can be changed into a prime (6329999821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2695887 + ... + 2698233.

It is an arithmetic number, because the mean of its divisors is an integer number (187370400).

Almost surely, 2^6329999820 is an apocalyptic number.

6329999820 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 6329999820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8993779200).

6329999820 is an abundant number, since it is smaller than the sum of its proper divisors (11657558580).

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

6329999820 is a wasteful number, since it uses less digits than its factorization.

6329999820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007 (or 3005 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 6329999820 is about 79561.2959924611. The cubic root of 6329999820 is about 1849.8417025499.

The spelling of 6329999820 in words is "six billion, three hundred twenty-nine million, nine hundred ninety-nine thousand, eight hundred twenty".