18001801089936 has 30 divisors (see below), whose sum is σ = 50380040550710. Its totient is φ = 6000600363264.

The previous prime is 18001801089913. The next prime is 18001801089971. The reversal of 18001801089936 is 63998010810081.

It can be written as a sum of positive squares in only one way, i.e., 15481517838336 + 2520283251600 = 3934656^2 + 1587540^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62506253641 + ... + 62506253928.

Almost surely, 2^{18001801089936} is an apocalyptic number.

18001801089936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18001801089936 is an abundant number, since it is smaller than the sum of its proper divisors (32378239460774).

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

18001801089936 is a wasteful number, since it uses less digits than its factorization.

18001801089936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125012507583 (or 125012507574 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 54.

The spelling of 18001801089936 in words is "eighteen trillion, one billion, eight hundred one million, eighty-nine thousand, nine hundred thirty-six".