67930381818 has 72 divisors (see below), whose sum is σ = 159469128000. Its totient is φ = 20889329760.

The previous prime is 67930381817. The next prime is 67930381853. The reversal of 67930381818 is 81818303976.

It is a super-2 number, since 2×67930381818² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67930381817) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6075373 + ... + 6086543.

It is an arithmetic number, because the mean of its divisors is an integer number (2214849000).

Almost surely, 2^67930381818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67930381818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79734564000).

67930381818 is an abundant number, since it is smaller than the sum of its proper divisors (91538746182).

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

67930381818 is a wasteful number, since it uses less digits than its factorization.

67930381818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13204 (or 13188 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 67930381818 in words is "sixty-seven billion, nine hundred thirty million, three hundred eighty-one thousand, eight hundred eighteen".