20853242959 has 2 divisors, whose sum is σ = 20853242960. Its totient is φ = 20853242958.

The previous prime is 20853242941. The next prime is 20853242981. The reversal of 20853242959 is 95924235802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20853242959 - 2¹¹ = 20853240911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20853242909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426621479 + 10426621480.

It is an arithmetic number, because the mean of its divisors is an integer number (10426621480).

Almost surely, 2^20853242959 is an apocalyptic number.

20853242959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20853242959 is an equidigital number, since it uses as much as digits as its factorization.

20853242959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 20853242959 in words is "twenty billion, eight hundred fifty-three million, two hundred forty-two thousand, nine hundred fifty-nine".