21203333343 has 24 divisors (see below), whose sum is σ = 30731890176. Its totient is φ = 14087232000.

The previous prime is 21203333321. The next prime is 21203333443. The reversal of 21203333343 is 34333330212.

It is a happy number.

It is not a de Polignac number, because 21203333343 - 2¹² = 21203329247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203333303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5342946 + ... + 5346912.

It is an arithmetic number, because the mean of its divisors is an integer number (1280495424).

Almost surely, 2^21203333343 is an apocalyptic number.

21203333343 is a deficient number, since it is larger than the sum of its proper divisors (9528556833).

21203333343 is a wasteful number, since it uses less digits than its factorization.

21203333343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5855 (or 5852 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 27.

Adding to 21203333343 its reverse (34333330212), we get a palindrome (55536663555).

The spelling of 21203333343 in words is "twenty-one billion, two hundred three million, three hundred thirty-three thousand, three hundred forty-three".