20522555144 has 48 divisors (see below), whose sum is σ = 48205464300. Its totient is φ = 8118811008.

The previous prime is 20522555093. The next prime is 20522555147. The reversal of 20522555144 is 44155522502.

It can be written as a sum of positive squares in 2 ways, for example, as 18316374244 + 2206180900 = 135338^2 + 46970^2 .

It is not an unprimeable number, because it can be changed into a prime (20522555147) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2008499 + ... + 2018690.

Almost surely, 2^20522555144 is an apocalyptic number.

It is an amenable number.

20522555144 is an abundant number, since it is smaller than the sum of its proper divisors (27682909156).

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

20522555144 is a wasteful number, since it uses less digits than its factorization.

20522555144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027222 (or 4027211 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 20522555144 in words is "twenty billion, five hundred twenty-two million, five hundred fifty-five thousand, one hundred forty-four".