21333352 has 16 divisors (see below), whose sum is σ = 42105600. Its totient is φ = 10105200.

The previous prime is 21333329. The next prime is 21333353. The reversal of 21333352 is 25333312.

It is a happy number.

It is a super-2 number, since 2×21333352² = 910223815111808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21333353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70024 + ... + 70327.

It is an arithmetic number, because the mean of its divisors is an integer number (2631600).

Almost surely, 2^21333352 is an apocalyptic number.

It is an amenable number.

21333352 is a deficient number, since it is larger than the sum of its proper divisors (20772248).

21333352 is a wasteful number, since it uses less digits than its factorization.

21333352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140376 (or 140372 counting only the distinct ones).

The product of its digits is 1620, while the sum is 22.

The square root of 21333352 is about 4618.8041742425. The cubic root of 21333352 is about 277.3445906324.

Adding to 21333352 its reverse (25333312), we get a palindrome (46666664).

The spelling of 21333352 in words is "twenty-one million, three hundred thirty-three thousand, three hundred fifty-two".