20674237 has 2 divisors, whose sum is σ = 20674238. Its totient is φ = 20674236.

The previous prime is 20674207. The next prime is 20674243. The reversal of 20674237 is 73247602.

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., 11758041 + 8916196 = 3429^2 + 2986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20674237 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20674199 and 20674208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20674207) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10337118 + 10337119.

It is an arithmetic number, because the mean of its divisors is an integer number (10337119).

Almost surely, 2^20674237 is an apocalyptic number.

It is an amenable number.

20674237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20674237 is an equidigital number, since it uses as much as digits as its factorization.

20674237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20674237 is about 4546.8931150842. The cubic root of 20674237 is about 274.4583808001.

The spelling of 20674237 in words is "twenty million, six hundred seventy-four thousand, two hundred thirty-seven".