18026935940 has 72 divisors (see below), whose sum is σ = 41665098888. Its totient is φ = 6546908160.

The previous prime is 18026935939. The next prime is 18026935961. The reversal of 18026935940 is 4953962081.

It can be written as a sum of positive squares in 12 ways, for example, as 12635558464 + 5391377476 = 112408^2 + 73426^2 .

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, 162464 + ... + 249896.

It is an arithmetic number, because the mean of its divisors is an integer number (578681929).

Almost surely, 2^18026935940 is an apocalyptic number.

18026935940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18026935940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20832549444).

18026935940 is an abundant number, since it is smaller than the sum of its proper divisors (23638162948).

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

18026935940 is a wasteful number, since it uses less digits than its factorization.

18026935940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87529 (or 87514 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 18026935940 in words is "eighteen billion, twenty-six million, nine hundred thirty-five thousand, nine hundred forty".