20420540141 has 2 divisors, whose sum is σ = 20420540142. Its totient is φ = 20420540140.

The previous prime is 20420540089. The next prime is 20420540143. The reversal of 20420540141 is 14104502402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12993720100 + 7426820041 = 113990^2 + 86179^2 .

It is a cyclic number.

It is not a de Polignac number, because 20420540141 - 2²² = 20416345837 is a prime.

Together with 20420540143, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20420540143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210270070 + 10210270071.

It is an arithmetic number, because the mean of its divisors is an integer number (10210270071).

Almost surely, 2^20420540141 is an apocalyptic number.

It is an amenable number.

20420540141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420540141 is an equidigital number, since it uses as much as digits as its factorization.

20420540141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 23.

The spelling of 20420540141 in words is "twenty billion, four hundred twenty million, five hundred forty thousand, one hundred forty-one".