21324646712 has 16 divisors (see below), whose sum is σ = 40158317400. Its totient is φ = 10615762080.

The previous prime is 21324646697. The next prime is 21324646747. The reversal of 21324646712 is 21764642312.

It is a happy number.

It is a super-2 number, since 2×21324646712² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5818214 + ... + 5821877.

Almost surely, 2^21324646712 is an apocalyptic number.

It is an amenable number.

21324646712 is a deficient number, since it is larger than the sum of its proper divisors (18833670688).

21324646712 is a wasteful number, since it uses less digits than its factorization.

21324646712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11640326 (or 11640322 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The spelling of 21324646712 in words is "twenty-one billion, three hundred twenty-four million, six hundred forty-six thousand, seven hundred twelve".