21333433342 has 16 divisors (see below), whose sum is σ = 34571814480. Its totient is φ = 9814738752.

The previous prime is 21333433327. The next prime is 21333433343. The reversal of 21333433342 is 24333433312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333433343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302592 + ... + 1318867.

It is an arithmetic number, because the mean of its divisors is an integer number (2160738405).

Almost surely, 2^21333433342 is an apocalyptic number.

21333433342 is a deficient number, since it is larger than the sum of its proper divisors (13238381138).

21333433342 is a wasteful number, since it uses less digits than its factorization.

21333433342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621787.

The product of its digits is 46656, while the sum is 31.

Adding to 21333433342 its reverse (24333433312), we get a palindrome (45666866654).

The spelling of 21333433342 in words is "twenty-one billion, three hundred thirty-three million, four hundred thirty-three thousand, three hundred forty-two".