20133222012 has 18 divisors (see below), whose sum is σ = 50892311288. Its totient is φ = 6711073992.

The previous prime is 20133221947. The next prime is 20133222019. The reversal of 20133222012 is 21022233102.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133222019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279628048 + ... + 279628119.

Almost surely, 2^20133222012 is an apocalyptic number.

It is an amenable number.

20133222012 is an abundant number, since it is smaller than the sum of its proper divisors (30759089276).

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

20133222012 is a wasteful number, since it uses less digits than its factorization.

20133222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559256177 (or 559256172 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20133222012 its reverse (21022233102), we get a palindrome (41155455114).

The spelling of 20133222012 in words is "twenty billion, one hundred thirty-three million, two hundred twenty-two thousand, twelve".