21339092741 has 2 divisors, whose sum is σ = 21339092742. Its totient is φ = 21339092740.

The previous prime is 21339092729. The next prime is 21339092771. The reversal of 21339092741 is 14729093312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20441850625 + 897242116 = 142975^2 + 29954^2 .

It is a cyclic number.

It is not a de Polignac number, because 21339092741 - 2¹⁰ = 21339091717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21339092771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10669546370 + 10669546371.

It is an arithmetic number, because the mean of its divisors is an integer number (10669546371).

Almost surely, 2^21339092741 is an apocalyptic number.

It is an amenable number.

21339092741 is a deficient number, since it is larger than the sum of its proper divisors (1).

21339092741 is an equidigital number, since it uses as much as digits as its factorization.

21339092741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 21339092741 in words is "twenty-one billion, three hundred thirty-nine million, ninety-two thousand, seven hundred forty-one".