21324469744 has 20 divisors (see below), whose sum is σ = 41361740824. Its totient is φ = 10650472128.

The previous prime is 21324469739. The next prime is 21324469799. The reversal of 21324469744 is 44796442312.

It is a junction number, because it is equal to n+sod(n) for n = 21324469694 and 21324469703.

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, 720207 + ... + 749230.

Almost surely, 2^21324469744 is an apocalyptic number.

It is an amenable number.

21324469744 is a deficient number, since it is larger than the sum of its proper divisors (20037271080).

21324469744 is a wasteful number, since it uses less digits than its factorization.

21324469744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470352 (or 1470346 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 46.

The spelling of 21324469744 in words is "twenty-one billion, three hundred twenty-four million, four hundred sixty-nine thousand, seven hundred forty-four".