20003303021 has 16 divisors (see below), whose sum is σ = 22655668224. Its totient is φ = 17522676864.

The previous prime is 20003303003. The next prime is 20003303027. The reversal of 20003303021 is 12030330002.

It is a cyclic number.

It is not a de Polignac number, because 20003303021 - 2³⁰ = 18929561197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20003302987 and 20003303005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003303027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225416 + ... + 301361.

It is an arithmetic number, because the mean of its divisors is an integer number (1415979264).

Almost surely, 2^20003303021 is an apocalyptic number.

It is an amenable number.

20003303021 is a deficient number, since it is larger than the sum of its proper divisors (2652365203).

20003303021 is a wasteful number, since it uses less digits than its factorization.

20003303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526940.

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 20003303021 its reverse (12030330002), we get a palindrome (32033633023).

The spelling of 20003303021 in words is "twenty billion, three million, three hundred three thousand, twenty-one".