20682247 has 2 divisors, whose sum is σ = 20682248. Its totient is φ = 20682246.

The previous prime is 20682199. The next prime is 20682253. The reversal of 20682247 is 74228602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20682247 - 2⁷ = 20682119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20682257) 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, 10341123 + 10341124.

It is an arithmetic number, because the mean of its divisors is an integer number (10341124).

Almost surely, 2^20682247 is an apocalyptic number.

20682247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20682247 is an equidigital number, since it uses as much as digits as its factorization.

20682247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20682247 is about 4547.7738510177. The cubic root of 20682247 is about 274.4938214917.

The spelling of 20682247 in words is "twenty million, six hundred eighty-two thousand, two hundred forty-seven".