20467247 has 2 divisors, whose sum is σ = 20467248. Its totient is φ = 20467246.

The previous prime is 20467189. The next prime is 20467259. The reversal of 20467247 is 74276402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20467247 - 2¹⁸ = 20205103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20467267) 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, 10233623 + 10233624.

It is an arithmetic number, because the mean of its divisors is an integer number (10233624).

Almost surely, 2^20467247 is an apocalyptic number.

20467247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20467247 is an equidigital number, since it uses as much as digits as its factorization.

20467247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 20467247 is about 4524.0741594275. The cubic root of 20467247 is about 273.5393497721.

The spelling of 20467247 in words is "twenty million, four hundred sixty-seven thousand, two hundred forty-seven".