21839838200 has 24 divisors (see below), whose sum is σ = 50777624280. Its totient is φ = 8735935200.

The previous prime is 21839838199. The next prime is 21839838247. The reversal of 21839838200 is 283893812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54599396 + ... + 54599795.

It is an arithmetic number, because the mean of its divisors is an integer number (2115734345).

Almost surely, 2^21839838200 is an apocalyptic number.

21839838200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21839838200 is an abundant number, since it is smaller than the sum of its proper divisors (28937786080).

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

21839838200 is a wasteful number, since it uses less digits than its factorization.

21839838200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109199207 (or 109199198 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 21839838200 in words is "twenty-one billion, eight hundred thirty-nine million, eight hundred thirty-eight thousand, two hundred".