20520222116 has 12 divisors (see below), whose sum is σ = 36265937820. Its totient is φ = 10158525600.

The previous prime is 20520222103. The next prime is 20520222131. The reversal of 20520222116 is 61122202502.

It can be written as a sum of positive squares in 2 ways, for example, as 12732865600 + 7787356516 = 112840^2 + 88246^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20520222091 and 20520222100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25395911 + ... + 25396718.

It is an arithmetic number, because the mean of its divisors is an integer number (3022161485).

Almost surely, 2^20520222116 is an apocalyptic number.

It is an amenable number.

20520222116 is a deficient number, since it is larger than the sum of its proper divisors (15745715704).

20520222116 is a wasteful number, since it uses less digits than its factorization.

20520222116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50792734 (or 50792732 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 20520222116 its reverse (61122202502), we get a palindrome (81642424618).

The spelling of 20520222116 in words is "twenty billion, five hundred twenty million, two hundred twenty-two thousand, one hundred sixteen".