20440042141 has 2 divisors, whose sum is σ = 20440042142. Its totient is φ = 20440042140.

The previous prime is 20440042087. The next prime is 20440042229. The reversal of 20440042141 is 14124004402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10392986916 + 10047055225 = 101946^2 + 100235^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440042141 - 2⁷ = 20440042013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440040141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220021070 + 10220021071.

It is an arithmetic number, because the mean of its divisors is an integer number (10220021071).

Almost surely, 2^20440042141 is an apocalyptic number.

It is an amenable number.

20440042141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440042141 is an equidigital number, since it uses as much as digits as its factorization.

20440042141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20440042141 its reverse (14124004402), we get a palindrome (34564046543).

The spelling of 20440042141 in words is "twenty billion, four hundred forty million, forty-two thousand, one hundred forty-one".