21445504535234 has 16 divisors (see below), whose sum is σ = 35579028315768. Its totient is φ = 9630413678592.

The previous prime is 21445504535207. The next prime is 21445504535267. The reversal of 21445504535234 is 43253540554412.

It can be written as a sum of positive squares in 4 ways, for example, as 16933266150025 + 4512238385209 = 4115005^2 + 2124203^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11146311167 + ... + 11146313090.

Almost surely, 2^{21445504535234} is an apocalyptic number.

21445504535234 is a deficient number, since it is larger than the sum of its proper divisors (14133523780534).

21445504535234 is a wasteful number, since it uses less digits than its factorization.

21445504535234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22292624309.

The product of its (nonzero) digits is 5760000, while the sum is 47.

The spelling of 21445504535234 in words is "twenty-one trillion, four hundred forty-five billion, five hundred four million, five hundred thirty-five thousand, two hundred thirty-four".