21242580480 has 800 divisors, whose sum is σ = 84845819520. Its totient is φ = 5036359680.

The previous prime is 21242580449. The next prime is 21242580487. The reversal of 21242580480 is 8408524212.

21242580480 is a `hidden beast` number, since 2 + 124 + 2 + 58 + 0 + 480 = 666.

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 (21242580487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 152824251 + ... + 152824389.

Almost surely, 2^21242580480 is an apocalyptic number.

21242580480 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 21242580480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42422909760).

21242580480 is an abundant number, since it is smaller than the sum of its proper divisors (63603239040).

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

21242580480 is a wasteful number, since it uses less digits than its factorization.

21242580480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The spelling of 21242580480 in words is "twenty-one billion, two hundred forty-two million, five hundred eighty thousand, four hundred eighty".