21160510506403 has 2 divisors, whose sum is σ = 21160510506404. Its totient is φ = 21160510506402.

The previous prime is 21160510506347. The next prime is 21160510506409. The reversal of 21160510506403 is 30460501506112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21160510506403 is a prime.

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

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580255253201 + 10580255253202.

It is an arithmetic number, because the mean of its divisors is an integer number (10580255253202).

Almost surely, 2^{21160510506403} is an apocalyptic number.

21160510506403 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160510506403 is an equidigital number, since it uses as much as digits as its factorization.

21160510506403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 21160510506403 in words is "twenty-one trillion, one hundred sixty billion, five hundred ten million, five hundred six thousand, four hundred three".