21733273 has 2 divisors, whose sum is σ = 21733274. Its totient is φ = 21733272.

The previous prime is 21733249. The next prime is 21733297. The reversal of 21733273 is 37233712.

It is a balanced prime because it is at equal distance from previous prime (21733249) and next prime (21733297).

It can be written as a sum of positive squares in only one way, i.e., 19998784 + 1734489 = 4472^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 21733273 - 2⁵ = 21733241 is a prime.

It is not a weakly prime, because it can be changed into another prime (21730273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10866636 + 10866637.

It is an arithmetic number, because the mean of its divisors is an integer number (10866637).

Almost surely, 2^21733273 is an apocalyptic number.

It is an amenable number.

21733273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21733273 is an equidigital number, since it uses as much as digits as its factorization.

21733273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 28.

The square root of 21733273 is about 4661.8958589827. The cubic root of 21733273 is about 279.0669323792.

Adding to 21733273 its reverse (37233712), we get a palindrome (58966985).

The spelling of 21733273 in words is "twenty-one million, seven hundred thirty-three thousand, two hundred seventy-three".