20440042229 has 2 divisors, whose sum is σ = 20440042230. Its totient is φ = 20440042228.

The previous prime is 20440042141. The next prime is 20440042291. The reversal of 20440042229 is 92224004402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13711941604 + 6728100625 = 117098^2 + 82025^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440042229 - 2¹² = 20440038133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440041229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10220021114 + 10220021115.

It is an arithmetic number, because the mean of its divisors is an integer number (10220021115).

Almost surely, 2^20440042229 is an apocalyptic number.

It is an amenable number.

20440042229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440042229 is an equidigital number, since it uses as much as digits as its factorization.

20440042229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 20440042229 in words is "twenty billion, four hundred forty million, forty-two thousand, two hundred twenty-nine".