21305424410104 has 16 divisors (see below), whose sum is σ = 39949183360800. Its totient is φ = 10652308847232.

The previous prime is 21305424410071. The next prime is 21305424410107. The reversal of 21305424410104 is 40101442450312.

It is a happy number.

It is a super-2 number, since 2×21305424410104² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21305424410107) 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, 50195184 + ... + 50617855.

It is an arithmetic number, because the mean of its divisors is an integer number (2496823960050).

Almost surely, 2^{21305424410104} is an apocalyptic number.

It is an amenable number.

21305424410104 is a deficient number, since it is larger than the sum of its proper divisors (18643758950696).

21305424410104 is a wasteful number, since it uses less digits than its factorization.

21305424410104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100839462 (or 100839458 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 21305424410104 its reverse (40101442450312), we get a palindrome (61406866860416).

The spelling of 21305424410104 in words is "twenty-one trillion, three hundred five billion, four hundred twenty-four million, four hundred ten thousand, one hundred four".