20403144034323 has 16 divisors (see below), whose sum is σ = 28637407440000. Its totient is φ = 12885559116480.

The previous prime is 20403144034319. The next prime is 20403144034327. The reversal of 20403144034323 is 32343044130402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20403144034319) and next prime (20403144034327).

It is not a de Polignac number, because 20403144034323 - 2² = 20403144034319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20403144034327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7684513 + ... + 9992898.

It is an arithmetic number, because the mean of its divisors is an integer number (1789837965000).

Almost surely, 2^{20403144034323} is an apocalyptic number.

20403144034323 is a deficient number, since it is larger than the sum of its proper divisors (8234263405677).

20403144034323 is a wasteful number, since it uses less digits than its factorization.

20403144034323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17697682.

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 20403144034323 its reverse (32343044130402), we get a palindrome (52746188164725).

The spelling of 20403144034323 in words is "twenty trillion, four hundred three billion, one hundred forty-four million, thirty-four thousand, three hundred twenty-three".