21354334 has 8 divisors (see below), whose sum is σ = 32052888. Its totient is φ = 10670040.

The previous prime is 21354301. The next prime is 21354337. The reversal of 21354334 is 43345312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21354299 and 21354308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354337) 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, 1789 + ... + 6775.

It is an arithmetic number, because the mean of its divisors is an integer number (4006611).

Almost surely, 2^21354334 is an apocalyptic number.

21354334 is a deficient number, since it is larger than the sum of its proper divisors (10698554).

21354334 is a wasteful number, since it uses less digits than its factorization.

21354334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130.

The product of its digits is 4320, while the sum is 25.

The square root of 21354334 is about 4621.0749831614. The cubic root of 21354334 is about 277.4354864504.

Adding to 21354334 its reverse (43345312), we get a palindrome (64699646).

The spelling of 21354334 in words is "twenty-one million, three hundred fifty-four thousand, three hundred thirty-four".