21041033 has 16 divisors (see below), whose sum is σ = 23654400. Its totient is φ = 18584640.

The previous prime is 21041029. The next prime is 21041047. The reversal of 21041033 is 33014012.

It is a cyclic number.

It is not a de Polignac number, because 21041033 - 2² = 21041029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21040999 and 21041017.

It is not an unprimeable number, because it can be changed into a prime (21041533) 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, 43688 + ... + 44166.

It is an arithmetic number, because the mean of its divisors is an integer number (1478400).

Almost surely, 2^21041033 is an apocalyptic number.

It is an amenable number.

21041033 is a deficient number, since it is larger than the sum of its proper divisors (2613367).

21041033 is a wasteful number, since it uses less digits than its factorization.

21041033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21041033 is about 4587.0505774408. The cubic root of 21041033 is about 276.0719942762.

Adding to 21041033 its reverse (33014012), we get a palindrome (54055045).

The spelling of 21041033 in words is "twenty-one million, forty-one thousand, thirty-three".