20505220035 has 32 divisors (see below), whose sum is σ = 32913796608. Its totient is φ = 10901030400.

The previous prime is 20505220027. The next prime is 20505220067. The reversal of 20505220035 is 53002250502.

It is not a de Polignac number, because 20505220035 - 2³ = 20505220027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20505219987 and 20505220014.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10946859 + ... + 10948731.

It is an arithmetic number, because the mean of its divisors is an integer number (1028556144).

Almost surely, 2^20505220035 is an apocalyptic number.

20505220035 is a deficient number, since it is larger than the sum of its proper divisors (12408576573).

20505220035 is a wasteful number, since it uses less digits than its factorization.

20505220035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835.

The product of its (nonzero) digits is 3000, while the sum is 24.

Adding to 20505220035 its reverse (53002250502), we get a palindrome (73507470537).

The spelling of 20505220035 in words is "twenty billion, five hundred five million, two hundred twenty thousand, thirty-five".