21303323055044 has 48 divisors (see below), whose sum is σ = 38006175349296. Its totient is φ = 10446524928000.

The previous prime is 21303323055031. The next prime is 21303323055059. The reversal of 21303323055044 is 44055032330312.

It can be written as a sum of positive squares in 8 ways, for example, as 2636499112900 + 18666823942144 = 1623730^2 + 4320512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21303323054995 and 21303323055013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75504554 + ... + 75786174.

It is an arithmetic number, because the mean of its divisors is an integer number (791795319777).

Almost surely, 2^{21303323055044} is an apocalyptic number.

It is an amenable number.

21303323055044 is a deficient number, since it is larger than the sum of its proper divisors (16702852294252).

21303323055044 is a wasteful number, since it uses less digits than its factorization.

21303323055044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283496 (or 283494 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 35.

Adding to 21303323055044 its reverse (44055032330312), we get a palindrome (65358355385356).

The spelling of 21303323055044 in words is "twenty-one trillion, three hundred three billion, three hundred twenty-three million, fifty-five thousand, forty-four".