21333333332 has 12 divisors (see below), whose sum is σ = 37427374740. Its totient is φ = 10639797696.

The previous prime is 21333333317. The next prime is 21333333341. The reversal of 21333333332 is 23333333312.

It can be written as a sum of positive squares in 2 ways, for example, as 6418573456 + 14914759876 = 80116^2 + 122126^2 .

It is a super-4 number, since 4×21333333332⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21333333295 and 21333333304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6715457 + ... + 6718632.

It is an arithmetic number, because the mean of its divisors is an integer number (3118947895).

Almost surely, 2^21333333332 is an apocalyptic number.

It is an amenable number.

21333333332 is a deficient number, since it is larger than the sum of its proper divisors (16094041408).

21333333332 is a wasteful number, since it uses less digits than its factorization.

21333333332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13434490 (or 13434488 counting only the distinct ones).

The product of its digits is 26244, while the sum is 29.

Adding to 21333333332 its reverse (23333333312), we get a palindrome (44666666644).

The spelling of 21333333332 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirty-three thousand, three hundred thirty-two".