21035269 has 2 divisors, whose sum is σ = 21035270. Its totient is φ = 21035268.

The previous prime is 21035249. The next prime is 21035281. The reversal of 21035269 is 96253012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18378369 + 2656900 = 4287^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 21035269 - 2⁹ = 21034757 is a prime.

It is a super-2 number, since 2×21035269² = 884965083804722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21035219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517634 + 10517635.

It is an arithmetic number, because the mean of its divisors is an integer number (10517635).

Almost surely, 2^21035269 is an apocalyptic number.

It is an amenable number.

21035269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21035269 is an equidigital number, since it uses as much as digits as its factorization.

21035269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 21035269 is about 4586.4222439719. The cubic root of 21035269 is about 276.0467828350.

The spelling of 21035269 in words is "twenty-one million, thirty-five thousand, two hundred sixty-nine".