21852029 has 2 divisors, whose sum is σ = 21852030. Its totient is φ = 21852028.

The previous prime is 21852013. The next prime is 21852037. The reversal of 21852029 is 92025812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 3232804 = 4315^2 + 1798^2 .

It is a cyclic number.

It is not a de Polignac number, because 21852029 - 2⁴ = 21852013 is a prime.

It is a super-2 number, since 2×21852029² = 955022342833682, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21851992 and 21852010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21852079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10926014 + 10926015.

It is an arithmetic number, because the mean of its divisors is an integer number (10926015).

Almost surely, 2^21852029 is an apocalyptic number.

It is an amenable number.

21852029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21852029 is an equidigital number, since it uses as much as digits as its factorization.

21852029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21852029 is about 4674.6153852483. The cubic root of 21852029 is about 279.5743063626.

The spelling of 21852029 in words is "twenty-one million, eight hundred fifty-two thousand, twenty-nine".