21104424143 has 8 divisors (see below), whose sum is σ = 23156091216. Its totient is φ = 19074937600.

The previous prime is 21104424139. The next prime is 21104424179. The reversal of 21104424143 is 34142440112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21104424143 - 2² = 21104424139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104424343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5543138 + ... + 5546943.

It is an arithmetic number, because the mean of its divisors is an integer number (2894511402).

Almost surely, 2^21104424143 is an apocalyptic number.

21104424143 is a deficient number, since it is larger than the sum of its proper divisors (2051667073).

21104424143 is a wasteful number, since it uses less digits than its factorization.

21104424143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11090265.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21104424143 its reverse (34142440112), we get a palindrome (55246864255).

The spelling of 21104424143 in words is "twenty-one billion, one hundred four million, four hundred twenty-four thousand, one hundred forty-three".