21655055010200 has 24 divisors (see below), whose sum is σ = 50348002899180. Its totient is φ = 8662022004000.

The previous prime is 21655055010187. The next prime is 21655055010203. The reversal of 21655055010200 is 201055055612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21655055010203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54137637326 + ... + 54137637725.

Almost surely, 2^{21655055010200} is an apocalyptic number.

21655055010200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21655055010200 is an abundant number, since it is smaller than the sum of its proper divisors (28692947888980).

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

21655055010200 is a wasteful number, since it uses less digits than its factorization.

21655055010200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108275275067 (or 108275275058 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 21655055010200 in words is "twenty-one trillion, six hundred fifty-five billion, fifty-five million, ten thousand, two hundred".