20310257066 has 16 divisors (see below), whose sum is σ = 33260558688. Its totient is φ = 9224826000.

The previous prime is 20310257059. The next prime is 20310257069. The reversal of 20310257066 is 66075201302.

It is not an unprimeable number, because it can be changed into a prime (20310257069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326180 + ... + 383423.

It is an arithmetic number, because the mean of its divisors is an integer number (2078784918).

Almost surely, 2^20310257066 is an apocalyptic number.

20310257066 is a deficient number, since it is larger than the sum of its proper divisors (12950301622).

20310257066 is a wasteful number, since it uses less digits than its factorization.

20310257066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710917.

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 20310257066 its reverse (66075201302), we get a palindrome (86385458368).

The spelling of 20310257066 in words is "twenty billion, three hundred ten million, two hundred fifty-seven thousand, sixty-six".