21010534305 has 16 divisors (see below), whose sum is σ = 35386163520. Its totient is φ = 10615848768.

The previous prime is 21010534283. The next prime is 21010534319. The reversal of 21010534305 is 50343501012.

It is not a de Polignac number, because 21010534305 - 2⁵ = 21010534273 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36860302 + ... + 36860871.

It is an arithmetic number, because the mean of its divisors is an integer number (2211635220).

Almost surely, 2^21010534305 is an apocalyptic number.

It is an amenable number.

21010534305 is a deficient number, since it is larger than the sum of its proper divisors (14375629215).

21010534305 is a wasteful number, since it uses less digits than its factorization.

21010534305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73721200.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 21010534305 in words is "twenty-one billion, ten million, five hundred thirty-four thousand, three hundred five".