21323061433220 has 24 divisors (see below), whose sum is σ = 44781628742424. Its totient is φ = 8528615100416.

The previous prime is 21323061433217. The next prime is 21323061433241. The reversal of 21323061433220 is 2233416032312.

It can be written as a sum of positive squares in 4 ways, for example, as 407659264324 + 20915402168896 = 638482^2 + 4573336^2 .

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, 37805117 + ... + 38364996.

It is an arithmetic number, because the mean of its divisors is an integer number (1865901197601).

Almost surely, 2^{21323061433220} is an apocalyptic number.

21323061433220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323061433220 is an abundant number, since it is smaller than the sum of its proper divisors (23458567309204).

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

21323061433220 is a wasteful number, since it uses less digits than its factorization.

21323061433220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76184119 (or 76184117 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21323061433220 its reverse (2233416032312), we get a palindrome (23556477465532).

The spelling of 21323061433220 in words is "twenty-one trillion, three hundred twenty-three billion, sixty-one million, four hundred thirty-three thousand, two hundred twenty".