21233029 has 2 divisors, whose sum is σ = 21233030. Its totient is φ = 21233028.

The previous prime is 21233027. The next prime is 21233059. The reversal of 21233029 is 92033212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19342404 + 1890625 = 4398^2 + 1375^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233029 - 2¹ = 21233027 is a prime.

Together with 21233027, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616514 + 10616515.

It is an arithmetic number, because the mean of its divisors is an integer number (10616515).

Almost surely, 2^21233029 is an apocalyptic number.

It is an amenable number.

21233029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233029 is an equidigital number, since it uses as much as digits as its factorization.

21233029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 21233029 is about 4607.9310975751. The cubic root of 21233029 is about 276.9091570896.

The spelling of 21233029 in words is "twenty-one million, two hundred thirty-three thousand, twenty-nine".