21324354 has 8 divisors (see below), whose sum is σ = 42648720. Its totient is φ = 7108116.

The previous prime is 21324313. The next prime is 21324361. The reversal of 21324354 is 45342312.

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

21324354 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777024 + ... + 1777035.

It is an arithmetic number, because the mean of its divisors is an integer number (5331090).

Almost surely, 2^21324354 is an apocalyptic number.

21324354 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21324354 is a wasteful number, since it uses less digits than its factorization.

21324354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554064.

The product of its digits is 2880, while the sum is 24.

The square root of 21324354 is about 4617.8300098639. The cubic root of 21324354 is about 277.3055922670.

Adding to 21324354 its reverse (45342312), we get a palindrome (66666666).

The spelling of 21324354 in words is "twenty-one million, three hundred twenty-four thousand, three hundred fifty-four".