21404042300024 has 16 divisors (see below), whose sum is σ = 40132629056520. Its totient is φ = 10702007884960.

The previous prime is 21404042300021. The next prime is 21404042300029. The reversal of 21404042300024 is 42000324040412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21404042299966 and 21404042300002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404042300021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10125359 + ... + 12055329.

Almost surely, 2^{21404042300024} is an apocalyptic number.

It is an amenable number.

21404042300024 is a deficient number, since it is larger than the sum of its proper divisors (18728586756496).

21404042300024 is a wasteful number, since it uses less digits than its factorization.

21404042300024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316270 (or 3316266 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 21404042300024 its reverse (42000324040412), we get a palindrome (63404366340436).

The spelling of 21404042300024 in words is "twenty-one trillion, four hundred four billion, forty-two million, three hundred thousand, twenty-four".