20432128338 has 40 divisors (see below), whose sum is σ = 47773680768. Its totient is φ = 6514590456.

The previous prime is 20432128333. The next prime is 20432128349. The reversal of 20432128338 is 83382123402.

20432128338 is a `hidden beast` number, since 20 + 4 + 321 + 283 + 38 = 666.

It is not an unprimeable number, because it can be changed into a prime (20432128333) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2738106 + ... + 2745557.

Almost surely, 2^20432128338 is an apocalyptic number.

20432128338 is an abundant number, since it is smaller than the sum of its proper divisors (27341552430).

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

20432128338 is a wasteful number, since it uses less digits than its factorization.

20432128338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483700 (or 5483691 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 20432128338 in words is "twenty billion, four hundred thirty-two million, one hundred twenty-eight thousand, three hundred thirty-eight".