201850019988 has 24 divisors (see below), whose sum is σ = 477616950720. Its totient is φ = 66335687040.

The previous prime is 201850019983. The next prime is 201850019999. The reversal of 201850019988 is 889910058102.

It is a self number, because there is not a number n which added to its sum of digits gives 201850019988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201850019983) 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, 118455733 + ... + 118457436.

It is an arithmetic number, because the mean of its divisors is an integer number (19900706280).

Almost surely, 2^201850019988 is an apocalyptic number.

It is an amenable number.

201850019988 is an abundant number, since it is smaller than the sum of its proper divisors (275766930732).

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

201850019988 is a wasteful number, since it uses less digits than its factorization.

201850019988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236913247 (or 236913245 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 51.

The spelling of 201850019988 in words is "two hundred one billion, eight hundred fifty million, nineteen thousand, nine hundred eighty-eight".