21236053 has 8 divisors (see below), whose sum is σ = 22425120. Its totient is φ = 20054160.

The previous prime is 21236041. The next prime is 21236063. The reversal of 21236053 is 35063212.

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 21236053 - 2⁵ = 21236021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21236063) 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, 4983 + ... + 8203.

It is an arithmetic number, because the mean of its divisors is an integer number (2803140).

Almost surely, 2^21236053 is an apocalyptic number.

It is an amenable number.

21236053 is a deficient number, since it is larger than the sum of its proper divisors (1189067).

21236053 is a wasteful number, since it uses less digits than its factorization.

21236053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 21236053 is about 4608.2592157994. The cubic root of 21236053 is about 276.9223022315.

Adding to 21236053 its reverse (35063212), we get a palindrome (56299265).

The spelling of 21236053 in words is "twenty-one million, two hundred thirty-six thousand, fifty-three".