6918021798 has 32 divisors (see below), whose sum is σ = 14002606080. Its totient is φ = 2278288320.

The previous prime is 6918021797. The next prime is 6918021821. The reversal of 6918021798 is 8971208196.

It is a self number, because there is not a number n which added to its sum of digits gives 6918021798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6918021793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 781111 + ... + 789917.

It is an arithmetic number, because the mean of its divisors is an integer number (437581440).

Almost surely, 2^6918021798 is an apocalyptic number.

6918021798 is an abundant number, since it is smaller than the sum of its proper divisors (7084584282).

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

6918021798 is a wasteful number, since it uses less digits than its factorization.

6918021798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10372.

The product of its (nonzero) digits is 435456, while the sum is 51.

The square root of 6918021798 is about 83174.6463653438. The cubic root of 6918021798 is about 1905.4342851545.

The spelling of 6918021798 in words is "six billion, nine hundred eighteen million, twenty-one thousand, seven hundred ninety-eight".