21034033 has 2 divisors, whose sum is σ = 21034034. Its totient is φ = 21034032.

The previous prime is 21034003. The next prime is 21034037. The reversal of 21034033 is 33043012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16224784 + 4809249 = 4028^2 + 2193^2 .

It is a cyclic number.

It is not a de Polignac number, because 21034033 - 2⁹ = 21033521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21033998 and 21034016.

It is not a weakly prime, because it can be changed into another prime (21034037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517016 + 10517017.

It is an arithmetic number, because the mean of its divisors is an integer number (10517017).

Almost surely, 2^21034033 is an apocalyptic number.

It is an amenable number.

21034033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21034033 is an equidigital number, since it uses as much as digits as its factorization.

21034033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 21034033 is about 4586.2874964398. The cubic root of 21034033 is about 276.0413760345.

Adding to 21034033 its reverse (33043012), we get a palindrome (54077045).

It can be divided in two parts, 210 and 34033, that added together give a palindrome (34243).

The spelling of 21034033 in words is "twenty-one million, thirty-four thousand, thirty-three".