20652641529439 has 2 divisors, whose sum is σ = 20652641529440. Its totient is φ = 20652641529438.

The previous prime is 20652641529437. The next prime is 20652641529469. The reversal of 20652641529439 is 93492514625602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20652641529439 - 2¹ = 20652641529437 is a prime.

Together with 20652641529437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20652641529437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10326320764719 + 10326320764720.

It is an arithmetic number, because the mean of its divisors is an integer number (10326320764720).

Almost surely, 2^{20652641529439} is an apocalyptic number.

20652641529439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20652641529439 is an equidigital number, since it uses as much as digits as its factorization.

20652641529439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27993600, while the sum is 58.

The spelling of 20652641529439 in words is "twenty trillion, six hundred fifty-two billion, six hundred forty-one million, five hundred twenty-nine thousand, four hundred thirty-nine".