21324312775 has 12 divisors (see below), whose sum is σ = 26836808872. Its totient is φ = 16804830240.

The previous prime is 21324312727. The next prime is 21324312859. The reversal of 21324312775 is 57721342312.

It is not a de Polignac number, because 21324312775 - 2²⁹ = 20787441863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6363792 + ... + 6367141.

Almost surely, 2^21324312775 is an apocalyptic number.

21324312775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21324312775 is a deficient number, since it is larger than the sum of its proper divisors (5512496097).

21324312775 is a wasteful number, since it uses less digits than its factorization.

21324312775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12731010 (or 12731005 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The spelling of 21324312775 in words is "twenty-one billion, three hundred twenty-four million, three hundred twelve thousand, seven hundred seventy-five".