21033113 has 8 divisors (see below), whose sum is σ = 21405216. Its totient is φ = 20664000.

The previous prime is 21033083. The next prime is 21033119. The reversal of 21033113 is 31133012.

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 21033113 - 2⁸ = 21032857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033119) 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, 16913 + ... + 18113.

It is an arithmetic number, because the mean of its divisors is an integer number (2675652).

Almost surely, 2^21033113 is an apocalyptic number.

It is an amenable number.

21033113 is a deficient number, since it is larger than the sum of its proper divisors (372103).

21033113 is a wasteful number, since it uses less digits than its factorization.

21033113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 21033113 is about 4586.1871963539. The cubic root of 21033113 is about 276.0373514177.

Adding to 21033113 its reverse (31133012), we get a palindrome (52166125).

The spelling of 21033113 in words is "twenty-one million, thirty-three thousand, one hundred thirteen".