18226791435008 has 72 divisors (see below), whose sum is σ = 39194274061488. Its totient is φ = 8409521590272.

The previous prime is 18226791435001. The next prime is 18226791435043. The reversal of 18226791435008 is 80053419762281.

It is not an unprimeable number, because it can be changed into a prime (18226791435001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8936666 + ... + 10785062.

It is a 1-persistent number, because it is pandigital, but 2⋅18226791435008 = 36453582870016 is not.

Almost surely, 2^{18226791435008} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18226791435008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19597137030744).

18226791435008 is an abundant number, since it is smaller than the sum of its proper divisors (20967482626480).

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

18226791435008 is a wasteful number, since it uses less digits than its factorization.

18226791435008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851389 (or 1851375 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 18226791435008 in words is "eighteen trillion, two hundred twenty-six billion, seven hundred ninety-one million, four hundred thirty-five thousand, eight".