20380576554448 has 80 divisors (see below), whose sum is σ = 43834418971200. Its totient is φ = 9101394662400.

The previous prime is 20380576554413. The next prime is 20380576554449. The reversal of 20380576554448 is 84445567508302.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380576554449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8093203 + ... + 10308301.

It is an arithmetic number, because the mean of its divisors is an integer number (547930237140).

Almost surely, 2^{20380576554448} 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 20380576554448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21917209485600).

20380576554448 is an abundant number, since it is smaller than the sum of its proper divisors (23453842416752).

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

20380576554448 is a wasteful number, since it uses less digits than its factorization.

20380576554448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216036 (or 2216030 counting only the distinct ones).

The product of its (nonzero) digits is 129024000, while the sum is 61.

The spelling of 20380576554448 in words is "twenty trillion, three hundred eighty billion, five hundred seventy-six million, five hundred fifty-four thousand, four hundred forty-eight".