20222968644 has 36 divisors (see below), whose sum is σ = 51151935744. Its totient is φ = 6736668912.

The previous prime is 20222968643. The next prime is 20222968657. The reversal of 20222968644 is 44686922202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20222968644.

It is not an unprimeable number, because it can be changed into a prime (20222968643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122832 + ... + 235655.

It is an arithmetic number, because the mean of its divisors is an integer number (1420887104).

Almost surely, 2^20222968644 is an apocalyptic number.

It is an amenable number.

20222968644 is an abundant number, since it is smaller than the sum of its proper divisors (30928967100).

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

20222968644 is a wasteful number, since it uses less digits than its factorization.

20222968644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360064 (or 360059 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 20222968644 in words is "twenty billion, two hundred twenty-two million, nine hundred sixty-eight thousand, six hundred forty-four".