21434933 has 8 divisors (see below), whose sum is σ = 23267328. Its totient is φ = 19628784.

The previous prime is 21434921. The next prime is 21434939. The reversal of 21434933 is 33943412.

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

It is a cyclic number.

It is not a de Polignac number, because 21434933 - 2²⁰ = 20386357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21434896 and 21434905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434939) 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 7 ways as a sum of consecutive naturals, for example, 4841 + ... + 8142.

It is an arithmetic number, because the mean of its divisors is an integer number (2908416).

Almost surely, 2^21434933 is an apocalyptic number.

It is an amenable number.

21434933 is a deficient number, since it is larger than the sum of its proper divisors (1832395).

21434933 is a wasteful number, since it uses less digits than its factorization.

21434933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13123.

The product of its digits is 7776, while the sum is 29.

The square root of 21434933 is about 4629.7875761205. The cubic root of 21434933 is about 277.7840956015.

The spelling of 21434933 in words is "twenty-one million, four hundred thirty-four thousand, nine hundred thirty-three".