20343731202605 has 8 divisors (see below), whose sum is σ = 24412810646112. Its totient is φ = 16274762826768.

The previous prime is 20343731202577. The next prime is 20343731202607. The reversal of 20343731202605 is 50620213734302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20343731202605 - 2¹⁰ = 20343731201581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343731202607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27363419 + ... + 28097048.

It is an arithmetic number, because the mean of its divisors is an integer number (3051601330764).

Almost surely, 2^{20343731202605} is an apocalyptic number.

It is an amenable number.

20343731202605 is a deficient number, since it is larger than the sum of its proper divisors (4069079443507).

20343731202605 is an equidigital number, since it uses as much as digits as its factorization.

20343731202605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55533835.

The product of its (nonzero) digits is 181440, while the sum is 38.

Adding to 20343731202605 its reverse (50620213734302), we get a palindrome (70963944936907).

The spelling of 20343731202605 in words is "twenty trillion, three hundred forty-three billion, seven hundred thirty-one million, two hundred two thousand, six hundred five".