6818072820 has 48 divisors (see below), whose sum is σ = 20559114240. Its totient is φ = 1678294656.

The previous prime is 6818072797. The next prime is 6818072837. The reversal of 6818072820 is 282708186.

It is a super-2 number, since 2×6818072820² = 92972233957645504800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4369780 + ... + 4371339.

It is an arithmetic number, because the mean of its divisors is an integer number (428314880).

Almost surely, 2^6818072820 is an apocalyptic number.

6818072820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6818072820 is an abundant number, since it is smaller than the sum of its proper divisors (13741041420).

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

6818072820 is a wasteful number, since it uses less digits than its factorization.

6818072820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741144 (or 8741142 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 6818072820 is about 82571.6223650716. The cubic root of 6818072820 is about 1896.2134022025.

The spelling of 6818072820 in words is "six billion, eight hundred eighteen million, seventy-two thousand, eight hundred twenty".