20544455152 has 80 divisors (see below), whose sum is σ = 45427092480. Its totient is φ = 8931686400.

The previous prime is 20544455093. The next prime is 20544455159. The reversal of 20544455152 is 25155444502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20544455159) 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, 205777 + ... + 288847.

It is an arithmetic number, because the mean of its divisors is an integer number (567838656).

Almost surely, 2^20544455152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20544455152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22713546240).

20544455152 is an abundant number, since it is smaller than the sum of its proper divisors (24882637328).

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

20544455152 is a wasteful number, since it uses less digits than its factorization.

20544455152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83162 (or 83156 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 37.

Adding to 20544455152 its reverse (25155444502), we get a palindrome (45699899654).

The spelling of 20544455152 in words is "twenty billion, five hundred forty-four million, four hundred fifty-five thousand, one hundred fifty-two".