20544563632 has 20 divisors (see below), whose sum is σ = 39970265896. Its totient is φ = 10229656320.

The previous prime is 20544563623. The next prime is 20544563671. The reversal of 20544563632 is 23636544502.

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, 2660118 + ... + 2667829.

Almost surely, 2^20544563632 is an apocalyptic number.

It is an amenable number.

20544563632 is a deficient number, since it is larger than the sum of its proper divisors (19425702264).

20544563632 is a wasteful number, since it uses less digits than its factorization.

20544563632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328196 (or 5328190 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 20544563632 in words is "twenty billion, five hundred forty-four million, five hundred sixty-three thousand, six hundred thirty-two".