21024516315 has 32 divisors (see below), whose sum is σ = 38292880896. Its totient is φ = 9750498560.

The previous prime is 21024516313. The next prime is 21024516343. The reversal of 21024516315 is 51361542012.

It is not a de Polignac number, because 21024516315 - 2¹ = 21024516313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21024516313) by changing a digit.

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, 2766234 + ... + 2773823.

It is an arithmetic number, because the mean of its divisors is an integer number (1196652528).

Almost surely, 2^21024516315 is an apocalyptic number.

21024516315 is a deficient number, since it is larger than the sum of its proper divisors (17268364581).

21024516315 is a wasteful number, since it uses less digits than its factorization.

21024516315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540099.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 21024516315 in words is "twenty-one billion, twenty-four million, five hundred sixteen thousand, three hundred fifteen".