21426504514415 has 192 divisors, whose sum is σ = 37623721726080. Its totient is φ = 11473670799360.

The previous prime is 21426504514409. The next prime is 21426504514417. The reversal of 21426504514415 is 51441540562412.

It is not a de Polignac number, because 21426504514415 - 2¹⁶ = 21426504448879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21426504514417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 52805849 + ... + 53210061.

It is an arithmetic number, because the mean of its divisors is an integer number (195956883990).

Almost surely, 2^{21426504514415} is an apocalyptic number.

21426504514415 is a deficient number, since it is larger than the sum of its proper divisors (16197217211665).

21426504514415 is a wasteful number, since it uses less digits than its factorization.

21426504514415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404362 (or 404355 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 44.

The spelling of 21426504514415 in words is "twenty-one trillion, four hundred twenty-six billion, five hundred four million, five hundred fourteen thousand, four hundred fifteen".