20128744328488 has 16 divisors (see below), whose sum is σ = 37741652932500. Its totient is φ = 10064303546496.

The previous prime is 20128744328477. The next prime is 20128744328489. The reversal of 20128744328488 is 88482344782102.

It can be written as a sum of positive squares in 2 ways, for example, as 20013973795204 + 114770533284 = 4473698^2 + 338778^2 .

It is a super-2 number, since 2×20128744328488² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20128744328489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7319653 + ... + 9686836.

Almost surely, 2^{20128744328488} is an apocalyptic number.

It is an amenable number.

20128744328488 is a deficient number, since it is larger than the sum of its proper divisors (17612908604012).

20128744328488 is a wasteful number, since it uses less digits than its factorization.

20128744328488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17154444 (or 17154440 counting only the distinct ones).

The product of its (nonzero) digits is 44040192, while the sum is 61.

The spelling of 20128744328488 in words is "twenty trillion, one hundred twenty-eight billion, seven hundred forty-four million, three hundred twenty-eight thousand, four hundred eighty-eight".