20440203029 has 2 divisors, whose sum is σ = 20440203030. Its totient is φ = 20440203028.

The previous prime is 20440202999. The next prime is 20440203031. The reversal of 20440203029 is 92030204402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14614392100 + 5825810929 = 120890^2 + 76327^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440203029 - 2²⁸ = 20171767573 is a prime.

Together with 20440203031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20440202989 and 20440203007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440203529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220101514 + 10220101515.

It is an arithmetic number, because the mean of its divisors is an integer number (10220101515).

Almost surely, 2^20440203029 is an apocalyptic number.

It is an amenable number.

20440203029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440203029 is an equidigital number, since it uses as much as digits as its factorization.

20440203029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 20440203029 in words is "twenty billion, four hundred forty million, two hundred three thousand, twenty-nine".