20425541128 has 8 divisors (see below), whose sum is σ = 38297889630. Its totient is φ = 10212770560.

The previous prime is 20425541119. The next prime is 20425541153. The reversal of 20425541128 is 82114552402.

It can be written as a sum of positive squares in only one way, i.e., 20255551684 + 169989444 = 142322^2 + 13038^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20425541093 and 20425541102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276596313 + ... + 1276596328.

Almost surely, 2^20425541128 is an apocalyptic number.

It is an amenable number.

20425541128 is a deficient number, since it is larger than the sum of its proper divisors (17872348502).

20425541128 is a wasteful number, since it uses less digits than its factorization.

20425541128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553192647 (or 2553192643 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The spelling of 20425541128 in words is "twenty billion, four hundred twenty-five million, five hundred forty-one thousand, one hundred twenty-eight".