20641344424 has 16 divisors (see below), whose sum is σ = 38736818100. Its totient is φ = 10311526272.

The previous prime is 20641344419. The next prime is 20641344443. The reversal of 20641344424 is 42444314602.

It can be written as a sum of positive squares in 2 ways, for example, as 14636644324 + 6004700100 = 120982^2 + 77490^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20641344424.

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, 1133647 + ... + 1151710.

Almost surely, 2^20641344424 is an apocalyptic number.

It is an amenable number.

20641344424 is a deficient number, since it is larger than the sum of its proper divisors (18095473676).

20641344424 is a wasteful number, since it uses less digits than its factorization.

20641344424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286492 (or 2286488 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The spelling of 20641344424 in words is "twenty billion, six hundred forty-one million, three hundred forty-four thousand, four hundred twenty-four".