21301353 has 16 divisors (see below), whose sum is σ = 31699200. Its totient is φ = 14137200.

The previous prime is 21301339. The next prime is 21301361. The reversal of 21301353 is 35310312.

It is not a de Polignac number, because 21301353 - 2⁵ = 21301321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21301363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4803 + ... + 8103.

It is an arithmetic number, because the mean of its divisors is an integer number (1981200).

Almost surely, 2^21301353 is an apocalyptic number.

It is an amenable number.

21301353 is a deficient number, since it is larger than the sum of its proper divisors (10397847).

21301353 is a wasteful number, since it uses less digits than its factorization.

21301353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549 (or 3543 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 21301353 is about 4615.3388824657. The cubic root of 21301353 is about 277.2058534024.

Adding to 21301353 its reverse (35310312), we get a palindrome (56611665).

The spelling of 21301353 in words is "twenty-one million, three hundred one thousand, three hundred fifty-three".