20043455515 has 32 divisors (see below), whose sum is σ = 26088557760. Its totient is φ = 14726959104.

The previous prime is 20043455483. The next prime is 20043455543. The reversal of 20043455515 is 51555434002.

It is not a de Polignac number, because 20043455515 - 2⁵ = 20043455483 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672469 + ... + 701641.

It is an arithmetic number, because the mean of its divisors is an integer number (815267430).

Almost surely, 2^20043455515 is an apocalyptic number.

20043455515 is a deficient number, since it is larger than the sum of its proper divisors (6045102245).

20043455515 is a wasteful number, since it uses less digits than its factorization.

20043455515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29391.

The product of its (nonzero) digits is 60000, while the sum is 34.

Adding to 20043455515 its reverse (51555434002), we get a palindrome (71598889517).

The spelling of 20043455515 in words is "twenty billion, forty-three million, four hundred fifty-five thousand, five hundred fifteen".