20454203205 has 96 divisors (see below), whose sum is σ = 37045427328. Its totient is φ = 10431590400.

The previous prime is 20454203201. The next prime is 20454203213. The reversal of 20454203205 is 50230245402.

It is a happy number.

20454203205 is a `hidden beast` number, since 2 + 0 + 454 + 2 + 0 + 3 + 205 = 666.

It is not a de Polignac number, because 20454203205 - 2² = 20454203201 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454203201) 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 95 ways as a sum of consecutive naturals, for example, 41658010 + ... + 41658500.

It is an arithmetic number, because the mean of its divisors is an integer number (385889868).

Almost surely, 2^20454203205 is an apocalyptic number.

It is an amenable number.

20454203205 is a deficient number, since it is larger than the sum of its proper divisors (16591224123).

20454203205 is a wasteful number, since it uses less digits than its factorization.

20454203205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 20454203205 its reverse (50230245402), we get a palindrome (70684448607).

The spelling of 20454203205 in words is "twenty billion, four hundred fifty-four million, two hundred three thousand, two hundred five".