21444023303434 has 4 divisors (see below), whose sum is σ = 32166034955154. Its totient is φ = 10722011651716.

The previous prime is 21444023303431. The next prime is 21444023303447. The reversal of 21444023303434 is 43430332044412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13469244982209 + 7974778321225 = 3670047^2 + 2823965^2 .

It is a super-2 number, since 2×21444023303434² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21444023303393 and 21444023303402.

It is not an unprimeable number, because it can be changed into a prime (21444023303431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5361005825857 + ... + 5361005825860.

Almost surely, 2^{21444023303434} is an apocalyptic number.

21444023303434 is a deficient number, since it is larger than the sum of its proper divisors (10722011651720).

21444023303434 is a wasteful number, since it uses less digits than its factorization.

21444023303434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10722011651719.

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 21444023303434 its reverse (43430332044412), we get a palindrome (64874355347846).

The spelling of 21444023303434 in words is "twenty-one trillion, four hundred forty-four billion, twenty-three million, three hundred three thousand, four hundred thirty-four".