20343235010447 has 4 divisors (see below), whose sum is σ = 20348304347880. Its totient is φ = 20338165673016.

The previous prime is 20343235010321. The next prime is 20343235010459. The reversal of 20343235010447 is 74401053234302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20343235010447 - 2¹⁴ = 20343234994063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20343235010447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343235010047) 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 in 3 ways as a sum of consecutive naturals, for example, 2534662697 + ... + 2534670722.

It is an arithmetic number, because the mean of its divisors is an integer number (5087076086970).

Almost surely, 2^{20343235010447} is an apocalyptic number.

20343235010447 is a deficient number, since it is larger than the sum of its proper divisors (5069337433).

20343235010447 is an equidigital number, since it uses as much as digits as its factorization.

20343235010447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5069337432.

The product of its (nonzero) digits is 241920, while the sum is 38.

Adding to 20343235010447 its reverse (74401053234302), we get a palindrome (94744288244749).

The spelling of 20343235010447 in words is "twenty trillion, three hundred forty-three billion, two hundred thirty-five million, ten thousand, four hundred forty-seven".