20226643212 has 12 divisors (see below), whose sum is σ = 47195500856. Its totient is φ = 6742214400.

The previous prime is 20226643159. The next prime is 20226643219. The reversal of 20226643212 is 21234662202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20226643212.

It is not an unprimeable number, because it can be changed into a prime (20226643219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842776789 + ... + 842776812.

Almost surely, 2^20226643212 is an apocalyptic number.

It is an amenable number.

20226643212 is an abundant number, since it is smaller than the sum of its proper divisors (26968857644).

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

20226643212 is a wasteful number, since it uses less digits than its factorization.

20226643212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685553608 (or 1685553606 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 20226643212 in words is "twenty billion, two hundred twenty-six million, six hundred forty-three thousand, two hundred twelve".