21248280000 has 210 divisors, whose sum is σ = 76107375344. Its totient is φ = 5666112000.

The previous prime is 21248279989. The next prime is 21248280007. The reversal of 21248280000 is 8284212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21248280007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 330489 + ... + 389511.

Almost surely, 2^21248280000 is an apocalyptic number.

21248280000 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 21248280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38053687672).

21248280000 is an abundant number, since it is smaller than the sum of its proper divisors (54859095344).

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

21248280000 is an equidigital number, since it uses as much as digits as its factorization.

21248280000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59061 (or 59033 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The spelling of 21248280000 in words is "twenty-one billion, two hundred forty-eight million, two hundred eighty thousand".