21343223093 has 2 divisors, whose sum is σ = 21343223094. Its totient is φ = 21343223092.

The previous prime is 21343223059. The next prime is 21343223137. The reversal of 21343223093 is 39032234312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13659298129 + 7683924964 = 116873^2 + 87658^2 .

It is a cyclic number.

It is not a de Polignac number, because 21343223093 - 2⁶ = 21343223029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21343253093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671611546 + 10671611547.

It is an arithmetic number, because the mean of its divisors is an integer number (10671611547).

Almost surely, 2^21343223093 is an apocalyptic number.

It is an amenable number.

21343223093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21343223093 is an equidigital number, since it uses as much as digits as its factorization.

21343223093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 32.

The spelling of 21343223093 in words is "twenty-one billion, three hundred forty-three million, two hundred twenty-three thousand, ninety-three".