20047521650 has 48 divisors (see below), whose sum is σ = 41541481800. Its totient is φ = 7146908160.

The previous prime is 20047521649. The next prime is 20047521667. The reversal of 20047521650 is 5612574002.

It can be written as a sum of positive squares in 12 ways, for example, as 76729 + 20047444921 = 277^2 + 141589^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 512915 + ... + 550614.

Almost surely, 2^20047521650 is an apocalyptic number.

20047521650 is an abundant number, since it is smaller than the sum of its proper divisors (21493960150).

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

20047521650 is a wasteful number, since it uses less digits than its factorization.

20047521650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063583 (or 1063578 counting only the distinct ones).

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

The spelling of 20047521650 in words is "twenty billion, forty-seven million, five hundred twenty-one thousand, six hundred fifty".