21648955300 has 432 divisors, whose sum is σ = 61552310400. Its totient is φ = 6444748800.

The previous prime is 21648955253. The next prime is 21648955301. The reversal of 21648955300 is 355984612.

It is not an unprimeable number, because it can be changed into a prime (21648955301) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 528023280 + ... + 528023320.

It is an arithmetic number, because the mean of its divisors is an integer number (142482200).

Almost surely, 2^21648955300 is an apocalyptic number.

21648955300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21648955300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30776155200).

21648955300 is an abundant number, since it is smaller than the sum of its proper divisors (39903355100).

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

21648955300 is a wasteful number, since it uses less digits than its factorization.

21648955300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 21648955300 in words is "twenty-one billion, six hundred forty-eight million, nine hundred fifty-five thousand, three hundred".