21333334252 has 12 divisors (see below), whose sum is σ = 37343693296. Its totient is φ = 10663707600.

The previous prime is 21333334249. The next prime is 21333334277. The reversal of 21333334252 is 25243333312.

It is a super-2 number, since 2×21333334252² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723624 + ... + 752527.

Almost surely, 2^21333334252 is an apocalyptic number.

It is an amenable number.

21333334252 is a deficient number, since it is larger than the sum of its proper divisors (16010359044).

21333334252 is a wasteful number, since it uses less digits than its factorization.

21333334252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479768 (or 1479766 counting only the distinct ones).

The product of its digits is 38880, while the sum is 31.

Adding to 21333334252 its reverse (25243333312), we get a palindrome (46576667564).

The spelling of 21333334252 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirty-four thousand, two hundred fifty-two".