21056160329 has 2 divisors, whose sum is σ = 21056160330. Its totient is φ = 21056160328.

The previous prime is 21056160311. The next prime is 21056160343. The reversal of 21056160329 is 92306165012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20114897929 + 941262400 = 141827^2 + 30680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21056160329 is a prime.

It is not a weakly prime, because it can be changed into another prime (21056160029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10528080164 + 10528080165.

It is an arithmetic number, because the mean of its divisors is an integer number (10528080165).

Almost surely, 2^21056160329 is an apocalyptic number.

It is an amenable number.

21056160329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21056160329 is an equidigital number, since it uses as much as digits as its factorization.

21056160329 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 35.

The spelling of 21056160329 in words is "twenty-one billion, fifty-six million, one hundred sixty thousand, three hundred twenty-nine".