21274442315 has 32 divisors (see below), whose sum is σ = 29429775360. Its totient is φ = 14461985664.

The previous prime is 21274442309. The next prime is 21274442327. The reversal of 21274442315 is 51324447212.

It is not a de Polignac number, because 21274442315 - 2¹² = 21274438219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 2168852 + ... + 2178638.

It is an arithmetic number, because the mean of its divisors is an integer number (919680480).

Almost surely, 2^21274442315 is an apocalyptic number.

21274442315 is a deficient number, since it is larger than the sum of its proper divisors (8155333045).

21274442315 is a wasteful number, since it uses less digits than its factorization.

21274442315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10331.

The product of its digits is 53760, while the sum is 35.

Adding to 21274442315 its reverse (51324447212), we get a palindrome (72598889527).

The spelling of 21274442315 in words is "twenty-one billion, two hundred seventy-four million, four hundred forty-two thousand, three hundred fifteen".