20312222012 has 12 divisors (see below), whose sum is σ = 35826282240. Its totient is φ = 10076141376.

The previous prime is 20312221921. The next prime is 20312222027. The reversal of 20312222012 is 21022221302.

It is a congruent number.

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, 19991837 + ... + 19992852.

It is an arithmetic number, because the mean of its divisors is an integer number (2985523520).

Almost surely, 2^20312222012 is an apocalyptic number.

It is an amenable number.

20312222012 is a deficient number, since it is larger than the sum of its proper divisors (15514060228).

20312222012 is a wasteful number, since it uses less digits than its factorization.

20312222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39984820 (or 39984818 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20312222012 its reverse (21022221302), we get a palindrome (41334443314).

The spelling of 20312222012 in words is "twenty billion, three hundred twelve million, two hundred twenty-two thousand, twelve".