21324750943 has 2 divisors, whose sum is σ = 21324750944. Its totient is φ = 21324750942.

The previous prime is 21324750929. The next prime is 21324750949. The reversal of 21324750943 is 34905742312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21324750943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21324750896 and 21324750905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21324750949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10662375471 + 10662375472.

It is an arithmetic number, because the mean of its divisors is an integer number (10662375472).

Almost surely, 2^21324750943 is an apocalyptic number.

21324750943 is a deficient number, since it is larger than the sum of its proper divisors (1).

21324750943 is an equidigital number, since it uses as much as digits as its factorization.

21324750943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 21324750943 in words is "twenty-one billion, three hundred twenty-four million, seven hundred fifty thousand, nine hundred forty-three".