21404144433043 has 6 divisors (see below), whose sum is σ = 22167669205604. Its totient is φ = 20666070486264.

The previous prime is 21404144433041. The next prime is 21404144433137. The reversal of 21404144433043 is 34033444140412.

It is a happy number.

It is not a de Polignac number, because 21404144433043 - 2¹ = 21404144433041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21404144432993 and 21404144433011.

It is not an unprimeable number, because it can be changed into a prime (21404144433041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12725412021 + ... + 12725413702.

Almost surely, 2^{21404144433043} is an apocalyptic number.

21404144433043 is a deficient number, since it is larger than the sum of its proper divisors (763524772561).

21404144433043 is an equidigital number, since it uses as much as digits as its factorization.

21404144433043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25450825781 (or 25450825752 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 21404144433043 its reverse (34033444140412), we get a palindrome (55437588573455).

The spelling of 21404144433043 in words is "twenty-one trillion, four hundred four billion, one hundred forty-four million, four hundred thirty-three thousand, forty-three".