20850647128 has 64 divisors (see below), whose sum is σ = 41109314400. Its totient is φ = 9901086720.

The previous prime is 20850647093. The next prime is 20850647131. The reversal of 20850647128 is 82174605802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4638450 + ... + 4642942.

Almost surely, 2^20850647128 is an apocalyptic number.

It is an amenable number.

20850647128 is a deficient number, since it is larger than the sum of its proper divisors (20258667272).

20850647128 is a wasteful number, since it uses less digits than its factorization.

20850647128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852 (or 4848 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 20850647128 in words is "twenty billion, eight hundred fifty million, six hundred forty-seven thousand, one hundred twenty-eight".