21334120 has 16 divisors (see below), whose sum is σ = 48001860. Its totient is φ = 8533632.

The previous prime is 21334067. The next prime is 21334123. The reversal of 21334120 is 2143312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19731364 + 1602756 = 4442^2 + 1266^2 .

It is a super-3 number, since 3×21334120³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21334094 and 21334103.

It is not an unprimeable number, because it can be changed into a prime (21334123) 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, 266637 + ... + 266716.

Almost surely, 2^21334120 is an apocalyptic number.

21334120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21334120 is an abundant number, since it is smaller than the sum of its proper divisors (26667740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21334120 is a wasteful number, since it uses less digits than its factorization.

21334120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533364 (or 533360 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21334120 is about 4618.8873118967. The cubic root of 21334120 is about 277.3479187246.

Adding to 21334120 its reverse (2143312), we get a palindrome (23477432).

The spelling of 21334120 in words is "twenty-one million, three hundred thirty-four thousand, one hundred twenty".