20481144403 has 4 divisors (see below), whose sum is σ = 20481637680. Its totient is φ = 20480651128.

The previous prime is 20481144337. The next prime is 20481144421. The reversal of 20481144403 is 30444118402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20481144403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20481147403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177988 + ... + 269521.

It is an arithmetic number, because the mean of its divisors is an integer number (5120409420).

Almost surely, 2^20481144403 is an apocalyptic number.

20481144403 is a deficient number, since it is larger than the sum of its proper divisors (493277).

20481144403 is an equidigital number, since it uses as much as digits as its factorization.

20481144403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493276.

The product of its (nonzero) digits is 12288, while the sum is 31.

The spelling of 20481144403 in words is "twenty billion, four hundred eighty-one million, one hundred forty-four thousand, four hundred three".