21232503343 has 2 divisors, whose sum is σ = 21232503344. Its totient is φ = 21232503342.

The previous prime is 21232503329. The next prime is 21232503361. The reversal of 21232503343 is 34330523212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21232503343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25232503343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616251671 + 10616251672.

It is an arithmetic number, because the mean of its divisors is an integer number (10616251672).

Almost surely, 2^21232503343 is an apocalyptic number.

21232503343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232503343 is an equidigital number, since it uses as much as digits as its factorization.

21232503343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 28.

The spelling of 21232503343 in words is "twenty-one billion, two hundred thirty-two million, five hundred three thousand, three hundred forty-three".