21414413443 has 8 divisors (see below), whose sum is σ = 22928851440. Its totient is φ = 19928282880.

The previous prime is 21414413431. The next prime is 21414413491. The reversal of 21414413443 is 34431441412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21414413443 is a prime.

It is a super-2 number, since 2×21414413443² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21414413413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7075293 + ... + 7078318.

It is an arithmetic number, because the mean of its divisors is an integer number (2866106430).

Almost surely, 2^21414413443 is an apocalyptic number.

21414413443 is a deficient number, since it is larger than the sum of its proper divisors (1514437997).

21414413443 is a wasteful number, since it uses less digits than its factorization.

21414413443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14153717.

The product of its digits is 18432, while the sum is 31.

Adding to 21414413443 its reverse (34431441412), we get a palindrome (55845854855).

The spelling of 21414413443 in words is "twenty-one billion, four hundred fourteen million, four hundred thirteen thousand, four hundred forty-three".