20303204121 has 40 divisors (see below), whose sum is σ = 30905820000. Its totient is φ = 13280604480.

The previous prime is 20303204107. The next prime is 20303204153. The reversal of 20303204121 is 12140230302.

It is not a de Polignac number, because 20303204121 - 2¹⁸ = 20302941977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20303204094 and 20303204103.

It is not an unprimeable number, because it can be changed into a prime (20303204021) 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 39 ways as a sum of consecutive naturals, for example, 933630 + ... + 955128.

It is an arithmetic number, because the mean of its divisors is an integer number (772645500).

Almost surely, 2^20303204121 is an apocalyptic number.

It is an amenable number.

20303204121 is a deficient number, since it is larger than the sum of its proper divisors (10602615879).

20303204121 is a wasteful number, since it uses less digits than its factorization.

20303204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21731 (or 21722 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20303204121 its reverse (12140230302), we get a palindrome (32443434423).

The spelling of 20303204121 in words is "twenty billion, three hundred three million, two hundred four thousand, one hundred twenty-one".