21403442220034 has 24 divisors (see below), whose sum is σ = 37356446302668. Its totient is φ = 9170540104320.

The previous prime is 21403442220007. The next prime is 21403442220037. The reversal of 21403442220034 is 43002224430412.

It can be written as a sum of positive squares in 2 ways, for example, as 21401291579409 + 2150640625 = 4626153^2 + 46375^2 .

It is a super-2 number, since 2×21403442220034² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21403442219978 and 21403442220005.

It is not an unprimeable number, because it can be changed into a prime (21403442220037) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 27757059 + ... + 28517734.

Almost surely, 2^{21403442220034} is an apocalyptic number.

21403442220034 is a deficient number, since it is larger than the sum of its proper divisors (15953004082634).

21403442220034 is a wasteful number, since it uses less digits than its factorization.

21403442220034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56278690 (or 56278683 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 21403442220034 its reverse (43002224430412), we get a palindrome (64405666650446).

The spelling of 21403442220034 in words is "twenty-one trillion, four hundred three billion, four hundred forty-two million, two hundred twenty thousand, thirty-four".