20233221012 has 36 divisors (see below), whose sum is σ = 53039351456. Its totient is φ = 6744406680.

The previous prime is 20233220993. The next prime is 20233221013. The reversal of 20233221012 is 21012233202.

It is a tau number, because it is divible by the number of its divisors (36).

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 (20233221013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10407064 + ... + 10409007.

Almost surely, 2^20233221012 is an apocalyptic number.

It is an amenable number.

20233221012 is an abundant number, since it is smaller than the sum of its proper divisors (32806130444).

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

20233221012 is a wasteful number, since it uses less digits than its factorization.

20233221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20816090 (or 20816076 counting only the distinct ones).

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

Adding to 20233221012 its reverse (21012233202), we get a palindrome (41245454214).

The spelling of 20233221012 in words is "twenty billion, two hundred thirty-three million, two hundred twenty-one thousand, twelve".