20019696128 has 40 divisors (see below), whose sum is σ = 42353268012. Its totient is φ = 9421029376.

The previous prime is 20019696089. The next prime is 20019696163. The reversal of 20019696128 is 82169691002.

It can be written as a sum of positive squares in 2 ways, for example, as 19479226624 + 540469504 = 139568^2 + 23248^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141325 + ... + 1158732.

Almost surely, 2^20019696128 is an apocalyptic number.

It is an amenable number.

20019696128 is an abundant number, since it is smaller than the sum of its proper divisors (22333571884).

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

20019696128 is an equidigital number, since it uses as much as digits as its factorization.

20019696128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300092 (or 2300076 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 20019696128 in words is "twenty billion, nineteen million, six hundred ninety-six thousand, one hundred twenty-eight".