6818431313820 has 96 divisors (see below), whose sum is σ = 22522818318336. Its totient is φ = 1508224435200.

The previous prime is 6818431313699. The next prime is 6818431313821. The reversal of 6818431313820 is 283131348186.

It is a super-2 number, since 2×6818431313820² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6818431313820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6818431313821) 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, 261831501 + ... + 261857540.

It is an arithmetic number, because the mean of its divisors is an integer number (234612690816).

Almost surely, 2^{6818431313820} is an apocalyptic number.

6818431313820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6818431313820 is an abundant number, since it is smaller than the sum of its proper divisors (15704387004516).

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

6818431313820 is a wasteful number, since it uses less digits than its factorization.

6818431313820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523689091 (or 523689089 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 6818431313820 in words is "six trillion, eight hundred eighteen billion, four hundred thirty-one million, three hundred thirteen thousand, eight hundred twenty".