20440026259 has 2 divisors, whose sum is σ = 20440026260. Its totient is φ = 20440026258.

The previous prime is 20440026251. The next prime is 20440026263. The reversal of 20440026259 is 95262004402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20440026259 - 2³ = 20440026251 is a prime.

It is not a weakly prime, because it can be changed into another prime (20440026251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220013129 + 10220013130.

It is an arithmetic number, because the mean of its divisors is an integer number (10220013130).

Almost surely, 2^20440026259 is an apocalyptic number.

20440026259 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440026259 is an equidigital number, since it uses as much as digits as its factorization.

20440026259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 20440026259 in words is "twenty billion, four hundred forty million, twenty-six thousand, two hundred fifty-nine".