20455012506 has 8 divisors (see below), whose sum is σ = 40910025024. Its totient is φ = 6818337500.

The previous prime is 20455012469. The next prime is 20455012507. The reversal of 20455012506 is 60521055402.

It is a sphenic number, since it is the product of 3 distinct primes.

20455012506 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20455012507) 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, 1704584370 + ... + 1704584381.

It is an arithmetic number, because the mean of its divisors is an integer number (5113753128).

Almost surely, 2^20455012506 is an apocalyptic number.

20455012506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20455012506 is a wasteful number, since it uses less digits than its factorization.

20455012506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3409168756.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 20455012506 its reverse (60521055402), we get a palindrome (80976067908).

The spelling of 20455012506 in words is "twenty billion, four hundred fifty-five million, twelve thousand, five hundred six".