20420532232439 has 2 divisors, whose sum is σ = 20420532232440. Its totient is φ = 20420532232438.

The previous prime is 20420532232391. The next prime is 20420532232453. The reversal of 20420532232439 is 93423223502402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20420532232439 - 2²⁰ = 20420531183863 is a prime.

It is a super-3 number, since 3×20420532232439³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20420532232396 and 20420532232405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20420532234439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210266116219 + 10210266116220.

It is an arithmetic number, because the mean of its divisors is an integer number (10210266116220).

Almost surely, 2^{20420532232439} is an apocalyptic number.

20420532232439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420532232439 is an equidigital number, since it uses as much as digits as its factorization.

20420532232439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 20420532232439 in words is "twenty trillion, four hundred twenty billion, five hundred thirty-two million, two hundred thirty-two thousand, four hundred thirty-nine".