20344340615203 has 4 divisors (see below), whose sum is σ = 22193826125688. Its totient is φ = 18494855104720.

The previous prime is 20344340615171. The next prime is 20344340615273. The reversal of 20344340615203 is 30251604344302.

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 20344340615203 - 2⁵ = 20344340615171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344340615273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924742755226 + ... + 924742755247.

It is an arithmetic number, because the mean of its divisors is an integer number (5548456531422).

Almost surely, 2^{20344340615203} is an apocalyptic number.

20344340615203 is a deficient number, since it is larger than the sum of its proper divisors (1849485510485).

20344340615203 is a wasteful number, since it uses less digits than its factorization.

20344340615203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849485510484.

The product of its (nonzero) digits is 207360, while the sum is 37.

Adding to 20344340615203 its reverse (30251604344302), we get a palindrome (50595944959505).

The spelling of 20344340615203 in words is "twenty trillion, three hundred forty-four billion, three hundred forty million, six hundred fifteen thousand, two hundred three".