20344503420143 has 16 divisors (see below), whose sum is σ = 23581873975296. Its totient is φ = 17191404506880.

The previous prime is 20344503420139. The next prime is 20344503420161. The reversal of 20344503420143 is 34102430544302.

It is a cyclic number.

It is not a de Polignac number, because 20344503420143 - 2² = 20344503420139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344503420133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63106178 + ... + 63427743.

It is an arithmetic number, because the mean of its divisors is an integer number (1473867123456).

Almost surely, 2^{20344503420143} is an apocalyptic number.

20344503420143 is a deficient number, since it is larger than the sum of its proper divisors (3237370555153).

20344503420143 is a wasteful number, since it uses less digits than its factorization.

20344503420143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126534254.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 20344503420143 its reverse (34102430544302), we get a palindrome (54446933964445).

The spelling of 20344503420143 in words is "twenty trillion, three hundred forty-four billion, five hundred three million, four hundred twenty thousand, one hundred forty-three".