21850282080 has 288 divisors, whose sum is σ = 82187003808. Its totient is φ = 5242060800.

The previous prime is 21850282073. The next prime is 21850282081. The reversal of 21850282080 is 8028205812.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21850282081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1529370 + ... + 1543590.

It is an arithmetic number, because the mean of its divisors is an integer number (285371541).

Almost surely, 2^21850282080 is an apocalyptic number.

21850282080 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 21850282080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41093501904).

21850282080 is an abundant number, since it is smaller than the sum of its proper divisors (60336721728).

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

21850282080 is a wasteful number, since it uses less digits than its factorization.

21850282080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14350 (or 14339 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

Adding to 21850282080 its reverse (8028205812), we get a palindrome (29878487892).

The spelling of 21850282080 in words is "twenty-one billion, eight hundred fifty million, two hundred eighty-two thousand, eighty".