21203202033 has 16 divisors (see below), whose sum is σ = 33828471040. Its totient is φ = 13048124112.

The previous prime is 21203201989. The next prime is 21203202037. The reversal of 21203202033 is 33020230212.

It is a happy number.

It is not a de Polignac number, because 21203202033 - 2¹⁰ = 21203201009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21203201997 and 21203202015.

It is not an unprimeable number, because it can be changed into a prime (21203202037) 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, 30203641 + ... + 30204342.

It is an arithmetic number, because the mean of its divisors is an integer number (2114279440).

Almost surely, 2^21203202033 is an apocalyptic number.

It is an amenable number.

21203202033 is a deficient number, since it is larger than the sum of its proper divisors (12625269007).

21203202033 is a wasteful number, since it uses less digits than its factorization.

21203202033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60408005 (or 60407999 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21203202033 its reverse (33020230212), we get a palindrome (54223432245).

The spelling of 21203202033 in words is "twenty-one billion, two hundred three million, two hundred two thousand, thirty-three".