20487544488 has 80 divisors (see below), whose sum is σ = 57491148660. Its totient is φ = 6816441600.

The previous prime is 20487544459. The next prime is 20487544513. The reversal of 20487544488 is 88444578402.

It can be written as a sum of positive squares in 2 ways, for example, as 19505474244 + 982070244 = 139662^2 + 31338^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 321348 + ... + 379788.

Almost surely, 2^20487544488 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 20487544488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28745574330).

20487544488 is an abundant number, since it is smaller than the sum of its proper divisors (37003604172).

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

20487544488 is a wasteful number, since it uses less digits than its factorization.

20487544488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59000 (or 58987 counting only the distinct ones).

The product of its (nonzero) digits is 9175040, while the sum is 54.

The spelling of 20487544488 in words is "twenty billion, four hundred eighty-seven million, five hundred forty-four thousand, four hundred eighty-eight".