21202023303 has 12 divisors (see below), whose sum is σ = 31082237368. Its totient is φ = 13923716400.

The previous prime is 21202023257. The next prime is 21202023307. The reversal of 21202023303 is 30332020212.

It is a happy number.

It is not a de Polignac number, because 21202023303 - 2¹² = 21202019207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202023307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17579848 + ... + 17581053.

Almost surely, 2^21202023303 is an apocalyptic number.

21202023303 is a deficient number, since it is larger than the sum of its proper divisors (9880214065).

21202023303 is a wasteful number, since it uses less digits than its factorization.

21202023303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35160974 (or 35160971 counting only the distinct ones).

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

Adding to 21202023303 its reverse (30332020212), we get a palindrome (51534043515).

The spelling of 21202023303 in words is "twenty-one billion, two hundred two million, twenty-three thousand, three hundred three".