21310612305 has 32 divisors (see below), whose sum is σ = 34903989120. Its totient is φ = 11096870400.

The previous prime is 21310612289. The next prime is 21310612331. The reversal of 21310612305 is 50321601312.

It is not a de Polignac number, because 21310612305 - 2⁴ = 21310612289 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 31 ways as a sum of consecutive naturals, for example, 2124141 + ... + 2134149.

It is an arithmetic number, because the mean of its divisors is an integer number (1090749660).

Almost surely, 2^21310612305 is an apocalyptic number.

It is an amenable number.

21310612305 is a deficient number, since it is larger than the sum of its proper divisors (13593376815).

21310612305 is a wasteful number, since it uses less digits than its factorization.

21310612305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13361.

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 21310612305 in words is "twenty-one billion, three hundred ten million, six hundred twelve thousand, three hundred five".