21333433343 has 2 divisors, whose sum is σ = 21333433344. Its totient is φ = 21333433342.

The previous prime is 21333433327. The next prime is 21333433361. The reversal of 21333433343 is 34333433312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21333433343 - 2⁴ = 21333433327 is a prime.

It is a super-4 number, since 4×21333433343⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21333433313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666716671 + 10666716672.

It is an arithmetic number, because the mean of its divisors is an integer number (10666716672).

Almost surely, 2^21333433343 is an apocalyptic number.

21333433343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333433343 is an equidigital number, since it uses as much as digits as its factorization.

21333433343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 32.

Adding to 21333433343 its reverse (34333433312), we get a palindrome (55666866655).

The spelling of 21333433343 in words is "twenty-one billion, three hundred thirty-three million, four hundred thirty-three thousand, three hundred forty-three".