68418018 has 48 divisors (see below), whose sum is σ = 156307320. Its totient is φ = 21595392.

The previous prime is 68418001. The next prime is 68418037. The reversal of 68418018 is 81081486.

It can be written as a sum of positive squares in 4 ways, for example, as 67125249 + 1292769 = 8193^2 + 1137^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26430 + ... + 28902.

Almost surely, 2^68418018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68418018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78153660).

68418018 is an abundant number, since it is smaller than the sum of its proper divisors (87889302).

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

68418018 is a wasteful number, since it uses less digits than its factorization.

68418018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 68418018 is about 8271.5184821168. The cubic root of 68418018 is about 409.0001773462. Note that the first 3 decimals are identical.

The spelling of 68418018 in words is "sixty-eight million, four hundred eighteen thousand, eighteen".