21232503329 has 2 divisors, whose sum is σ = 21232503330. Its totient is φ = 21232503328.

The previous prime is 21232503269. The next prime is 21232503343. The reversal of 21232503329 is 92330523212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17896285729 + 3336217600 = 133777^2 + 57760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21232503329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21232503295 and 21232503304.

It is not a weakly prime, because it can be changed into another prime (21232503389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616251664 + 10616251665.

It is an arithmetic number, because the mean of its divisors is an integer number (10616251665).

Almost surely, 2^21232503329 is an apocalyptic number.

It is an amenable number.

21232503329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232503329 is an equidigital number, since it uses as much as digits as its factorization.

21232503329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The spelling of 21232503329 in words is "twenty-one billion, two hundred thirty-two million, five hundred three thousand, three hundred twenty-nine".