20620446066 has 48 divisors (see below), whose sum is σ = 48748789440. Its totient is φ = 6247395360.

The previous prime is 20620446037. The next prime is 20620446071. The reversal of 20620446066 is 66064402602.

20620446066 = T₁₁₆₃₅ + T₁₁₆₃₆ + ... + T₁₁₉₃₁.

20620446066 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 0 + 44 + 606 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20620446066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1988491 + ... + 1998833.

It is an arithmetic number, because the mean of its divisors is an integer number (1015599780).

Almost surely, 2^20620446066 is an apocalyptic number.

20620446066 is an abundant number, since it is smaller than the sum of its proper divisors (28128343374).

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

20620446066 is a wasteful number, since it uses less digits than its factorization.

20620446066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20431 (or 20428 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 20620446066 its reverse (66064402602), we get a palindrome (86684848668).

The spelling of 20620446066 in words is "twenty billion, six hundred twenty million, four hundred forty-six thousand, sixty-six".