20022257444 has 12 divisors (see below), whose sum is σ = 40044514944. Its totient is φ = 8580967464.

The previous prime is 20022257429. The next prime is 20022257461. The reversal of 20022257444 is 44475222002.

20022257444 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022257444.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357540284 + ... + 357540339.

It is an arithmetic number, because the mean of its divisors is an integer number (3337042912).

Almost surely, 2^20022257444 is an apocalyptic number.

It is an amenable number.

20022257444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20022257444 is a wasteful number, since it uses less digits than its factorization.

20022257444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715080634 (or 715080632 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 32.

Adding to 20022257444 its reverse (44475222002), we get a palindrome (64497479446).

The spelling of 20022257444 in words is "twenty billion, twenty-two million, two hundred fifty-seven thousand, four hundred forty-four".