20005123552 has 24 divisors (see below), whose sum is σ = 39389075712. Its totient is φ = 10001548800.

The previous prime is 20005123543. The next prime is 20005123559. The reversal of 20005123552 is 25532150002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005123559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366177 + ... + 417247.

It is an arithmetic number, because the mean of its divisors is an integer number (1641211488).

Almost surely, 2^20005123552 is an apocalyptic number.

It is an amenable number.

20005123552 is a deficient number, since it is larger than the sum of its proper divisors (19383952160).

20005123552 is a wasteful number, since it uses less digits than its factorization.

20005123552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63322 (or 63314 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20005123552 its reverse (25532150002), we get a palindrome (45537273554).

The spelling of 20005123552 in words is "twenty billion, five million, one hundred twenty-three thousand, five hundred fifty-two".