21342353 has 8 divisors (see below), whose sum is σ = 22334976. Its totient is φ = 20368800.

The previous prime is 21342341. The next prime is 21342359. The reversal of 21342353 is 35324312.

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 21342353 - 2⁴ = 21342337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2453 + ... + 6978.

It is an arithmetic number, because the mean of its divisors is an integer number (2791872).

Almost surely, 2^21342353 is an apocalyptic number.

It is an amenable number.

21342353 is a deficient number, since it is larger than the sum of its proper divisors (992623).

21342353 is an equidigital number, since it uses as much as digits as its factorization.

21342353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535.

The product of its digits is 2160, while the sum is 23.

The square root of 21342353 is about 4619.7784578917. The cubic root of 21342353 is about 277.3835910303.

Adding to 21342353 its reverse (35324312), we get a palindrome (56666665).

The spelling of 21342353 in words is "twenty-one million, three hundred forty-two thousand, three hundred fifty-three".