21433514 has 8 divisors (see below), whose sum is σ = 32511780. Its totient is φ = 10596256.

The previous prime is 21433507. The next prime is 21433519. The reversal of 21433514 is 41533412.

It can be written as a sum of positive squares in 2 ways, for example, as 20403289 + 1030225 = 4517^2 + 1015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21433514.

It is not an unprimeable number, because it can be changed into a prime (21433519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60029 + ... + 60384.

Almost surely, 2^21433514 is an apocalyptic number.

21433514 is a deficient number, since it is larger than the sum of its proper divisors (11078266).

21433514 is a wasteful number, since it uses less digits than its factorization.

21433514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120504.

The product of its digits is 1440, while the sum is 23.

The square root of 21433514 is about 4629.6343268124. The cubic root of 21433514 is about 277.7779656651. Note that the first 3 decimals are identical.

Adding to 21433514 its reverse (41533412), we get a palindrome (62966926).

The spelling of 21433514 in words is "twenty-one million, four hundred thirty-three thousand, five hundred fourteen".