20145332203 has 4 divisors (see below), whose sum is σ = 20145860928. Its totient is φ = 20144803480.

The previous prime is 20145332191. The next prime is 20145332209. The reversal of 20145332203 is 30223354102.

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-20145332203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20145332209) 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 3 ways as a sum of consecutive naturals, for example, 202363 + ... + 285028.

It is an arithmetic number, because the mean of its divisors is an integer number (5036465232).

Almost surely, 2^20145332203 is an apocalyptic number.

20145332203 is a deficient number, since it is larger than the sum of its proper divisors (528725).

20145332203 is an equidigital number, since it uses as much as digits as its factorization.

20145332203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528724.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20145332203 its reverse (30223354102), we get a palindrome (50368686305).

The spelling of 20145332203 in words is "twenty billion, one hundred forty-five million, three hundred thirty-two thousand, two hundred three".