20005432133 has 4 divisors (see below), whose sum is σ = 20054345580. Its totient is φ = 19956518688.

The previous prime is 20005432121. The next prime is 20005432141. The reversal of 20005432133 is 33123450002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17636371204 + 2369060929 = 132802^2 + 48673^2 .

It is a cyclic number.

It is not a de Polignac number, because 20005432133 - 2⁸ = 20005431877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20005432099 and 20005432108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005432033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24456110 + ... + 24456927.

It is an arithmetic number, because the mean of its divisors is an integer number (5013586395).

Almost surely, 2^20005432133 is an apocalyptic number.

It is an amenable number.

20005432133 is a deficient number, since it is larger than the sum of its proper divisors (48913447).

20005432133 is an equidigital number, since it uses as much as digits as its factorization.

20005432133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48913446.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 20005432133 its reverse (33123450002), we get a palindrome (53128882135).

The spelling of 20005432133 in words is "twenty billion, five million, four hundred thirty-two thousand, one hundred thirty-three".