20433320505 has 48 divisors (see below), whose sum is σ = 38163879936. Its totient is φ = 10053763200.

The previous prime is 20433320491. The next prime is 20433320507. The reversal of 20433320505 is 50502333402.

20433320505 is a `hidden beast` number, since 20 + 433 + 3 + 205 + 0 + 5 = 666.

It is not a de Polignac number, because 20433320505 - 2⁵ = 20433320473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20433320507) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1132384 + ... + 1150286.

It is an arithmetic number, because the mean of its divisors is an integer number (795080832).

Almost surely, 2^20433320505 is an apocalyptic number.

It is an amenable number.

20433320505 is a deficient number, since it is larger than the sum of its proper divisors (17730559431).

20433320505 is a wasteful number, since it uses less digits than its factorization.

20433320505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19878 (or 19875 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 27.

Adding to 20433320505 its reverse (50502333402), we get a palindrome (70935653907).

The spelling of 20433320505 in words is "twenty billion, four hundred thirty-three million, three hundred twenty thousand, five hundred five".