20311072210 has 32 divisors (see below), whose sum is σ = 42951529152. Its totient is φ = 6817702080.

The previous prime is 20311072163. The next prime is 20311072213. The reversal of 20311072210 is 1227011302.

It is not an unprimeable number, because it can be changed into a prime (20311072213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7100344 + ... + 7103203.

It is an arithmetic number, because the mean of its divisors is an integer number (1342235286).

Almost surely, 2^20311072210 is an apocalyptic number.

20311072210 is an abundant number, since it is smaller than the sum of its proper divisors (22640456942).

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

20311072210 is a wasteful number, since it uses less digits than its factorization.

20311072210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14203578.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 20311072210 its reverse (1227011302), we get a palindrome (21538083512).

The spelling of 20311072210 in words is "twenty billion, three hundred eleven million, seventy-two thousand, two hundred ten".