20522225444 has 48 divisors (see below), whose sum is σ = 44518844160. Its totient is φ = 8075965440.

The previous prime is 20522225431. The next prime is 20522225447. The reversal of 20522225444 is 44452222502.

It is a self number, because there is not a number n which added to its sum of digits gives 20522225444.

It is not an unprimeable number, because it can be changed into a prime (20522225447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506264 + ... + 545295.

It is an arithmetic number, because the mean of its divisors is an integer number (927475920).

Almost surely, 2^20522225444 is an apocalyptic number.

It is an amenable number.

20522225444 is an abundant number, since it is smaller than the sum of its proper divisors (23996618716).

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

20522225444 is a wasteful number, since it uses less digits than its factorization.

20522225444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051628 (or 1051626 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 32.

Adding to 20522225444 its reverse (44452222502), we get a palindrome (64974447946).

The spelling of 20522225444 in words is "twenty billion, five hundred twenty-two million, two hundred twenty-five thousand, four hundred forty-four".