201818324080 has 40 divisors (see below), whose sum is σ = 469327831632. Its totient is φ = 80710086144.

The previous prime is 201818324077. The next prime is 201818324087. The reversal of 201818324080 is 80423818102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201818324087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110772 + ... + 644908.

Almost surely, 2^201818324080 is an apocalyptic number.

201818324080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201818324080 is an abundant number, since it is smaller than the sum of its proper divisors (267509507552).

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

201818324080 is a wasteful number, since it uses less digits than its factorization.

201818324080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538873 (or 538867 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The spelling of 201818324080 in words is "two hundred one billion, eight hundred eighteen million, three hundred twenty-four thousand, eighty".