20402420024089 has 2 divisors, whose sum is σ = 20402420024090. Its totient is φ = 20402420024088.

The previous prime is 20402420024027. The next prime is 20402420024167. The reversal of 20402420024089 is 98042002420402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15925526862400 + 4476893161689 = 3990680^2 + 2115867^2 .

It is a cyclic number.

It is not a de Polignac number, because 20402420024089 - 2¹¹ = 20402420022041 is a prime.

It is not a weakly prime, because it can be changed into another prime (20402420034089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201210012044 + 10201210012045.

It is an arithmetic number, because the mean of its divisors is an integer number (10201210012045).

Almost surely, 2^{20402420024089} is an apocalyptic number.

It is an amenable number.

20402420024089 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402420024089 is an equidigital number, since it uses as much as digits as its factorization.

20402420024089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 20402420024089 in words is "twenty trillion, four hundred two billion, four hundred twenty million, twenty-four thousand, eighty-nine".