21502360054519 has 2 divisors, whose sum is σ = 21502360054520. Its totient is φ = 21502360054518.

The previous prime is 21502360054493. The next prime is 21502360054529. The reversal of 21502360054519 is 91545006320512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21502360054519 - 2⁷ = 21502360054391 is a prime.

It is a super-2 number, since 2×21502360054519² (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 (21502360054529) 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, 10751180027259 + 10751180027260.

It is an arithmetic number, because the mean of its divisors is an integer number (10751180027260).

Almost surely, 2^{21502360054519} is an apocalyptic number.

21502360054519 is a deficient number, since it is larger than the sum of its proper divisors (1).

21502360054519 is an equidigital number, since it uses as much as digits as its factorization.

21502360054519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 21502360054519 in words is "twenty-one trillion, five hundred two billion, three hundred sixty million, fifty-four thousand, five hundred nineteen".