20344010403 has 16 divisors (see below), whose sum is σ = 28506342656. Its totient is φ = 12889225440.

The previous prime is 20344010399. The next prime is 20344010417. The reversal of 20344010403 is 30401044302.

It is not a de Polignac number, because 20344010403 - 2² = 20344010399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20344010403.

It is not an unprimeable number, because it can be changed into a prime (20344010503) 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, 2126383 + ... + 2135928.

It is an arithmetic number, because the mean of its divisors is an integer number (1781646416).

Almost surely, 2^20344010403 is an apocalyptic number.

20344010403 is a deficient number, since it is larger than the sum of its proper divisors (8162332253).

20344010403 is a wasteful number, since it uses less digits than its factorization.

20344010403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262394.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20344010403 its reverse (30401044302), we get a palindrome (50745054705).

The spelling of 20344010403 in words is "twenty billion, three hundred forty-four million, ten thousand, four hundred three".