21433469 has 2 divisors, whose sum is σ = 21433470. Its totient is φ = 21433468.

The previous prime is 21433453. The next prime is 21433487. The reversal of 21433469 is 96433412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 5736025 = 3962^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433469 - 2⁴ = 21433453 is a prime.

It is a super-2 number, since 2×21433469² = 918787186747922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21433439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716734 + 10716735.

It is an arithmetic number, because the mean of its divisors is an integer number (10716735).

Almost surely, 2^21433469 is an apocalyptic number.

It is an amenable number.

21433469 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433469 is an equidigital number, since it uses as much as digits as its factorization.

21433469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

The square root of 21433469 is about 4629.6294668148. The cubic root of 21433469 is about 277.7777712652. Note that the first 5 decimals are identical.

The spelling of 21433469 in words is "twenty-one million, four hundred thirty-three thousand, four hundred sixty-nine".