21133713 has 8 divisors (see below), whose sum is σ = 28368000. Its totient is φ = 13994288.

The previous prime is 21133687. The next prime is 21133727. The reversal of 21133713 is 31733112.

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 21133713 - 2⁶ = 21133649 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21133713.

It is not an unprimeable number, because it can be changed into a prime (21133733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23193 + ... + 24086.

It is an arithmetic number, because the mean of its divisors is an integer number (3546000).

Almost surely, 2^21133713 is an apocalyptic number.

It is an amenable number.

21133713 is a deficient number, since it is larger than the sum of its proper divisors (7234287).

21133713 is a wasteful number, since it uses less digits than its factorization.

21133713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47431.

The product of its digits is 378, while the sum is 21.

The square root of 21133713 is about 4597.1418294414. The cubic root of 21133713 is about 276.4767411523.

Adding to 21133713 its reverse (31733112), we get a palindrome (52866825).

The spelling of 21133713 in words is "twenty-one million, one hundred thirty-three thousand, seven hundred thirteen".