21441552232220 has 24 divisors (see below), whose sum is σ = 45066379857408. Its totient is φ = 8569169432000.

The previous prime is 21441552232207. The next prime is 21441552232333. The reversal of 21441552232220 is 2223225514412.

It is a super-2 number, since 2×21441552232220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 465692711 + ... + 465738750.

It is an arithmetic number, because the mean of its divisors is an integer number (1877765827392).

Almost surely, 2^{21441552232220} is an apocalyptic number.

21441552232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441552232220 is an abundant number, since it is smaller than the sum of its proper divisors (23624827625188).

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

21441552232220 is a wasteful number, since it uses less digits than its factorization.

21441552232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931432621 (or 931432619 counting only the distinct ones).

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

Adding to 21441552232220 its reverse (2223225514412), we get a palindrome (23664777746632).

The spelling of 21441552232220 in words is "twenty-one trillion, four hundred forty-one billion, five hundred fifty-two million, two hundred thirty-two thousand, two hundred twenty".