20444422064 has 40 divisors (see below), whose sum is σ = 43436042832. Its totient is φ = 9244753920.

The previous prime is 20444422049. The next prime is 20444422073. The reversal of 20444422064 is 46022444402.

It is a self number, because there is not a number n which added to its sum of digits gives 20444422064.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266969 + ... + 334904.

Almost surely, 2^20444422064 is an apocalyptic number.

It is an amenable number.

20444422064 is an abundant number, since it is smaller than the sum of its proper divisors (22991620768).

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

20444422064 is a wasteful number, since it uses less digits than its factorization.

20444422064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602085 (or 602079 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 20444422064 its reverse (46022444402), we get a palindrome (66466866466).

The spelling of 20444422064 in words is "twenty billion, four hundred forty-four million, four hundred twenty-two thousand, sixty-four".