21208886200 has 48 divisors (see below), whose sum is σ = 49637291760. Its totient is φ = 8427360000.

The previous prime is 21208886191. The next prime is 21208886219. The reversal of 21208886200 is 268880212.

It is a self number, because there is not a number n which added to its sum of digits gives 21208886200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320941 + ... + 381340.

It is an arithmetic number, because the mean of its divisors is an integer number (1034110245).

Almost surely, 2^21208886200 is an apocalyptic number.

21208886200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21208886200 is an abundant number, since it is smaller than the sum of its proper divisors (28428405560).

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

21208886200 is a wasteful number, since it uses less digits than its factorization.

21208886200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702448 (or 702439 counting only the distinct ones).

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

The spelling of 21208886200 in words is "twenty-one billion, two hundred eight million, eight hundred eighty-six thousand, two hundred".