20432501689 has 2 divisors, whose sum is σ = 20432501690. Its totient is φ = 20432501688.

The previous prime is 20432501681. The next prime is 20432501699. The reversal of 20432501689 is 98610523402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20071805625 + 360696064 = 141675^2 + 18992^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432501689 - 2³ = 20432501681 is a prime.

It is not a weakly prime, because it can be changed into another prime (20432501681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216250844 + 10216250845.

It is an arithmetic number, because the mean of its divisors is an integer number (10216250845).

Almost surely, 2^20432501689 is an apocalyptic number.

It is an amenable number.

20432501689 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432501689 is an equidigital number, since it uses as much as digits as its factorization.

20432501689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 20432501689 in words is "twenty billion, four hundred thirty-two million, five hundred one thousand, six hundred eighty-nine".