20420044147 has 2 divisors, whose sum is σ = 20420044148. Its totient is φ = 20420044146.

The previous prime is 20420044111. The next prime is 20420044153. The reversal of 20420044147 is 74144002402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20420044147 - 2³¹ = 18272560499 is a prime.

It is not a weakly prime, because it can be changed into another prime (20420045147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210022073 + 10210022074.

It is an arithmetic number, because the mean of its divisors is an integer number (10210022074).

Almost surely, 2^20420044147 is an apocalyptic number.

20420044147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420044147 is an equidigital number, since it uses as much as digits as its factorization.

20420044147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 28.

Adding to 20420044147 its reverse (74144002402), we get a palindrome (94564046549).

The spelling of 20420044147 in words is "twenty billion, four hundred twenty million, forty-four thousand, one hundred forty-seven".