20403451203 has 4 divisors (see below), whose sum is σ = 27204601608. Its totient is φ = 13602300800.

The previous prime is 20403451193. The next prime is 20403451253. The reversal of 20403451203 is 30215430402.

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

It is a cyclic number.

It is not a de Polignac number, because 20403451203 - 2⁶ = 20403451139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20403451253) 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, 3400575198 + ... + 3400575203.

It is an arithmetic number, because the mean of its divisors is an integer number (6801150402).

Almost surely, 2^20403451203 is an apocalyptic number.

20403451203 is a deficient number, since it is larger than the sum of its proper divisors (6801150405).

20403451203 is an equidigital number, since it uses as much as digits as its factorization.

20403451203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801150404.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20403451203 its reverse (30215430402), we get a palindrome (50618881605).

The spelling of 20403451203 in words is "twenty billion, four hundred three million, four hundred fifty-one thousand, two hundred three".