20203204121403 has 4 divisors (see below), whose sum is σ = 26937605495208. Its totient is φ = 13468802747600.

The previous prime is 20203204121389. The next prime is 20203204121431. The reversal of 20203204121403 is 30412140230202.

It is a happy number.

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-20203204121403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20203204120403) 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, 3367200686898 + ... + 3367200686903.

It is an arithmetic number, because the mean of its divisors is an integer number (6734401373802).

Almost surely, 2^{20203204121403} is an apocalyptic number.

20203204121403 is a deficient number, since it is larger than the sum of its proper divisors (6734401373805).

20203204121403 is an equidigital number, since it uses as much as digits as its factorization.

20203204121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6734401373804.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20203204121403 its reverse (30412140230202), we get a palindrome (50615344351605).

The spelling of 20203204121403 in words is "twenty trillion, two hundred three billion, two hundred four million, one hundred twenty-one thousand, four hundred three".