20553744484 has 96 divisors (see below), whose sum is σ = 44731766016. Its totient is φ = 8046673920.

The previous prime is 20553744473. The next prime is 20553744493. The reversal of 20553744484 is 48444735502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31965067 + ... + 31965709.

It is an arithmetic number, because the mean of its divisors is an integer number (465955896).

Almost surely, 2^20553744484 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 20553744484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22365883008).

20553744484 is an abundant number, since it is smaller than the sum of its proper divisors (24178021532).

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

20553744484 is a wasteful number, since it uses less digits than its factorization.

20553744484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 46.

The spelling of 20553744484 in words is "twenty billion, five hundred fifty-three million, seven hundred forty-four thousand, four hundred eighty-four".