20630131266 has 16 divisors (see below), whose sum is σ = 41261671584. Its totient is φ = 6876475584.

The previous prime is 20630131243. The next prime is 20630131271. The reversal of 20630131266 is 66213103602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303945 + ... + 365571.

It is an arithmetic number, because the mean of its divisors is an integer number (2578854474).

Almost surely, 2^20630131266 is an apocalyptic number.

20630131266 is an abundant number, since it is smaller than the sum of its proper divisors (20631540318).

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

20630131266 is a wasteful number, since it uses less digits than its factorization.

20630131266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117425.

The product of its (nonzero) digits is 7776, while the sum is 30.

Adding to 20630131266 its reverse (66213103602), we get a palindrome (86843234868).

The spelling of 20630131266 in words is "twenty billion, six hundred thirty million, one hundred thirty-one thousand, two hundred sixty-six".