20576131728 has 40 divisors (see below), whose sum is σ = 53346936768. Its totient is φ = 6833945472.

The previous prime is 20576131691. The next prime is 20576131789. The reversal of 20576131728 is 82713167502.

It is a super-3 number, since 3×20576131728³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20576131728.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760476 + ... + 787067.

Almost surely, 2^20576131728 is an apocalyptic number.

It is an amenable number.

20576131728 is an abundant number, since it is smaller than the sum of its proper divisors (32770805040).

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

20576131728 is a wasteful number, since it uses less digits than its factorization.

20576131728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547831 (or 1547825 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 20576131728 in words is "twenty billion, five hundred seventy-six million, one hundred thirty-one thousand, seven hundred twenty-eight".