20025705641 has 8 divisors (see below), whose sum is σ = 20223750600. Its totient is φ = 19828509568.

The previous prime is 20025705599. The next prime is 20025705647. The reversal of 20025705641 is 14650752002.

It can be written as a sum of positive squares in 4 ways, for example, as 25806400 + 19999899241 = 5080^2 + 141421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20025705641 - 2¹⁰ = 20025704617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20025705598 and 20025705607.

It is not an unprimeable number, because it can be changed into a prime (20025705647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164756 + ... + 259221.

It is an arithmetic number, because the mean of its divisors is an integer number (2527968825).

Almost surely, 2^20025705641 is an apocalyptic number.

It is an amenable number.

20025705641 is a deficient number, since it is larger than the sum of its proper divisors (198044959).

20025705641 is a wasteful number, since it uses less digits than its factorization.

20025705641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424443.

The product of its (nonzero) digits is 16800, while the sum is 32.

The spelling of 20025705641 in words is "twenty billion, twenty-five million, seven hundred five thousand, six hundred forty-one".