21496741829 has 2 divisors, whose sum is σ = 21496741830. Its totient is φ = 21496741828.

The previous prime is 21496741817. The next prime is 21496741837. The reversal of 21496741829 is 92814769412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17111256100 + 4385485729 = 130810^2 + 66223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21496741829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21496741129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10748370914 + 10748370915.

It is an arithmetic number, because the mean of its divisors is an integer number (10748370915).

Almost surely, 2^21496741829 is an apocalyptic number.

It is an amenable number.

21496741829 is a deficient number, since it is larger than the sum of its proper divisors (1).

21496741829 is an equidigital number, since it uses as much as digits as its factorization.

21496741829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The spelling of 21496741829 in words is "twenty-one billion, four hundred ninety-six million, seven hundred forty-one thousand, eight hundred twenty-nine".