21232342493 has 2 divisors, whose sum is σ = 21232342494. Its totient is φ = 21232342492.

The previous prime is 21232342409. The next prime is 21232342499. The reversal of 21232342493 is 39424323212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12082846084 + 9149496409 = 109922^2 + 95653^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232342493 - 2¹⁴ = 21232326109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232342499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616171246 + 10616171247.

It is an arithmetic number, because the mean of its divisors is an integer number (10616171247).

Almost surely, 2^21232342493 is an apocalyptic number.

It is an amenable number.

21232342493 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232342493 is an equidigital number, since it uses as much as digits as its factorization.

21232342493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 35.

The spelling of 21232342493 in words is "twenty-one billion, two hundred thirty-two million, three hundred forty-two thousand, four hundred ninety-three".