20440020347 has 2 divisors, whose sum is σ = 20440020348. Its totient is φ = 20440020346.

The previous prime is 20440020301. The next prime is 20440020353. The reversal of 20440020347 is 74302004402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20440020347 - 2¹⁸ = 20439758203 is a prime.

It is not a weakly prime, because it can be changed into another prime (20440020047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220010173 + 10220010174.

It is an arithmetic number, because the mean of its divisors is an integer number (10220010174).

Almost surely, 2^20440020347 is an apocalyptic number.

20440020347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440020347 is an equidigital number, since it uses as much as digits as its factorization.

20440020347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 26.

Adding to 20440020347 its reverse (74302004402), we get a palindrome (94742024749).

The spelling of 20440020347 in words is "twenty billion, four hundred forty million, twenty thousand, three hundred forty-seven".