21029033 has 2 divisors, whose sum is σ = 21029034. Its totient is φ = 21029032.

The previous prime is 21029003. The next prime is 21029059. The reversal of 21029033 is 33092012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20866624 + 162409 = 4568^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 21029033 - 2¹⁰ = 21028009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21028996 and 21029014.

It is not a weakly prime, because it can be changed into another prime (21029003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10514516 + 10514517.

It is an arithmetic number, because the mean of its divisors is an integer number (10514517).

Almost surely, 2^21029033 is an apocalyptic number.

It is an amenable number.

21029033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21029033 is an equidigital number, since it uses as much as digits as its factorization.

21029033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 21029033 is about 4585.7423608397. The cubic root of 21029033 is about 276.0195017026.

The spelling of 21029033 in words is "twenty-one million, twenty-nine thousand, thirty-three".