21035033 has 4 divisors (see below), whose sum is σ = 22142160. Its totient is φ = 19927908.

The previous prime is 21035029. The next prime is 21035059. The reversal of 21035033 is 33053012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21035033 - 2² = 21035029 is a prime.

It is a super-2 number, since 2×21035033² = 884945226622178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21035233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553535 + ... + 553572.

It is an arithmetic number, because the mean of its divisors is an integer number (5535540).

Almost surely, 2^21035033 is an apocalyptic number.

It is an amenable number.

21035033 is a deficient number, since it is larger than the sum of its proper divisors (1107127).

21035033 is a wasteful number, since it uses less digits than its factorization.

21035033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107126.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 21035033 is about 4586.3965157845. The cubic root of 21035033 is about 276.0457504849.

Adding to 21035033 its reverse (33053012), we get a palindrome (54088045).

The spelling of 21035033 in words is "twenty-one million, thirty-five thousand, thirty-three".