21160324652549 has 2 divisors, whose sum is σ = 21160324652550. Its totient is φ = 21160324652548.

The previous prime is 21160324652507. The next prime is 21160324652563. The reversal of 21160324652549 is 94525642306112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16510772589025 + 4649552063524 = 4063345^2 + 2156282^2 .

It is a cyclic number.

It is not a de Polignac number, because 21160324652549 - 2²⁸ = 21160056217093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21160324652497 and 21160324652506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21160324652149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580162326274 + 10580162326275.

It is an arithmetic number, because the mean of its divisors is an integer number (10580162326275).

Almost surely, 2^{21160324652549} is an apocalyptic number.

It is an amenable number.

21160324652549 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160324652549 is an equidigital number, since it uses as much as digits as its factorization.

21160324652549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 21160324652549 in words is "twenty-one trillion, one hundred sixty billion, three hundred twenty-four million, six hundred fifty-two thousand, five hundred forty-nine".