20344113243505 has 8 divisors (see below), whose sum is σ = 24628979573352. Its totient is φ = 16131261474048.

The previous prime is 20344113243479. The next prime is 20344113243527. The reversal of 20344113243505 is 50534231144302.

It can be written as a sum of positive squares in 4 ways, for example, as 952622848576 + 19391490394929 = 976024^2 + 4403577^2 .

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 20344113243505 - 2¹¹ = 20344113241457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18003639474 + ... + 18003640603.

It is an arithmetic number, because the mean of its divisors is an integer number (3078622446669).

Almost surely, 2^{20344113243505} is an apocalyptic number.

It is an amenable number.

20344113243505 is a deficient number, since it is larger than the sum of its proper divisors (4284866329847).

20344113243505 is a wasteful number, since it uses less digits than its factorization.

20344113243505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36007280195.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 20344113243505 its reverse (50534231144302), we get a palindrome (70878344387807).

The spelling of 20344113243505 in words is "twenty trillion, three hundred forty-four billion, one hundred thirteen million, two hundred forty-three thousand, five hundred five".