21441520532420 has 48 divisors (see below), whose sum is σ = 46586505717360. Its totient is φ = 8279680743936.

The previous prime is 21441520532401. The next prime is 21441520532503. The reversal of 21441520532420 is 2423502514412.

It can be written as a sum of positive squares in 8 ways, for example, as 2231743185604 + 19209777346816 = 1493902^2 + 4382896^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431854 + ... + 6703226.

It is an arithmetic number, because the mean of its divisors is an integer number (970552202445).

Almost surely, 2^{21441520532420} is an apocalyptic number.

21441520532420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441520532420 is an abundant number, since it is smaller than the sum of its proper divisors (25144985184940).

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

21441520532420 is a wasteful number, since it uses less digits than its factorization.

21441520532420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278424 (or 5278422 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 21441520532420 in words is "twenty-one trillion, four hundred forty-one billion, five hundred twenty million, five hundred thirty-two thousand, four hundred twenty".