68199018 has 32 divisors (see below), whose sum is σ = 144944640. Its totient is φ = 21331440.

The previous prime is 68199017. The next prime is 68199049. The reversal of 68199018 is 81099186.

It is a super-2 number, since 2×68199018² = 9302212112328648, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68199013) 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, 9403 + ... + 14993.

It is an arithmetic number, because the mean of its divisors is an integer number (4529520).

Almost surely, 2^68199018 is an apocalyptic number.

68199018 is an abundant number, since it is smaller than the sum of its proper divisors (76745622).

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

68199018 is a wasteful number, since it uses less digits than its factorization.

68199018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5722.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 68199018 is about 8258.2696734849. The cubic root of 68199018 is about 408.5633198175.

It can be divided in two parts, 681 and 99018, that added together give a palindrome (99699).

The spelling of 68199018 in words is "sixty-eight million, one hundred ninety-nine thousand, eighteen".