20663021043 has 144 divisors (see below), whose sum is σ = 37174606560. Its totient is φ = 11007360000.

The previous prime is 20663021021. The next prime is 20663021047. The reversal of 20663021043 is 34012036602.

20663021043 is a `hidden beast` number, since 2 + 0 + 6 + 630 + 21 + 0 + 4 + 3 = 666.

It is not a de Polignac number, because 20663021043 - 2⁵ = 20663021011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20663020998 and 20663021016.

It is not an unprimeable number, because it can be changed into a prime (20663021047) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 82322668 + ... + 82322918.

It is an arithmetic number, because the mean of its divisors is an integer number (258156990).

Almost surely, 2^20663021043 is an apocalyptic number.

20663021043 is a deficient number, since it is larger than the sum of its proper divisors (16511585517).

20663021043 is a wasteful number, since it uses less digits than its factorization.

20663021043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 20663021043 its reverse (34012036602), we get a palindrome (54675057645).

The spelling of 20663021043 in words is "twenty billion, six hundred sixty-three million, twenty-one thousand, forty-three".