21160510506469 has 2 divisors, whose sum is σ = 21160510506470. Its totient is φ = 21160510506468.

The previous prime is 21160510506419. The next prime is 21160510506557. The reversal of 21160510506469 is 96460501506112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17902799568900 + 3257710937569 = 4231170^2 + 1804913^2 .

It is a cyclic number.

It is not a de Polignac number, because 21160510506469 - 2³³ = 21151920571877 is a prime.

It is a super-2 number, since 2×21160510506469² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21160510506409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580255253234 + 10580255253235.

It is an arithmetic number, because the mean of its divisors is an integer number (10580255253235).

Almost surely, 2^{21160510506469} is an apocalyptic number.

It is an amenable number.

21160510506469 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160510506469 is an equidigital number, since it uses as much as digits as its factorization.

21160510506469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 21160510506469 in words is "twenty-one trillion, one hundred sixty billion, five hundred ten million, five hundred six thousand, four hundred sixty-nine".