20237249 has 2 divisors, whose sum is σ = 20237250. Its totient is φ = 20237248.

The previous prime is 20237237. The next prime is 20237251. The reversal of 20237249 is 94273202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 4870849 = 3920^2 + 2207^2 .

It is a cyclic number.

It is not a de Polignac number, because 20237249 - 2⁴ = 20237233 is a prime.

Together with 20237251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20237209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10118624 + 10118625.

It is an arithmetic number, because the mean of its divisors is an integer number (10118625).

Almost surely, 2^20237249 is an apocalyptic number.

It is an amenable number.

20237249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20237249 is an equidigital number, since it uses as much as digits as its factorization.

20237249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20237249 is about 4498.5829991232. The cubic root of 20237249 is about 272.5108667776.

The spelling of 20237249 in words is "twenty million, two hundred thirty-seven thousand, two hundred forty-nine".