21332029 has 2 divisors, whose sum is σ = 21332030. Its totient is φ = 21332028.

The previous prime is 21332009. The next prime is 21332053. The reversal of 21332029 is 92023312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 492804 = 4565^2 + 702^2 .

It is a cyclic number.

It is not a de Polignac number, because 21332029 - 2⁷ = 21331901 is a prime.

It is a super-2 number, since 2×21332029² = 910110922513682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666014 + 10666015.

It is an arithmetic number, because the mean of its divisors is an integer number (10666015).

Almost surely, 2^21332029 is an apocalyptic number.

It is an amenable number.

21332029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332029 is an equidigital number, since it uses as much as digits as its factorization.

21332029 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 21332029 is about 4618.6609531335. The cubic root of 21332029 is about 277.3388572862.

The spelling of 21332029 in words is "twenty-one million, three hundred thirty-two thousand, twenty-nine".