21461126443 has 4 divisors (see below), whose sum is σ = 21493992528. Its totient is φ = 21428260360.

The previous prime is 21461126437. The next prime is 21461126471. The reversal of 21461126443 is 34462116412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21461126443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21461126399 and 21461126408.

It is not an unprimeable number, because it can be changed into a prime (21461123443) 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, 16432063 + ... + 16433368.

It is an arithmetic number, because the mean of its divisors is an integer number (5373498132).

Almost surely, 2^21461126443 is an apocalyptic number.

21461126443 is a deficient number, since it is larger than the sum of its proper divisors (32866085).

21461126443 is an equidigital number, since it uses as much as digits as its factorization.

21461126443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32866084.

The product of its digits is 27648, while the sum is 34.

The spelling of 21461126443 in words is "twenty-one billion, four hundred sixty-one million, one hundred twenty-six thousand, four hundred forty-three".