20471267 has 2 divisors, whose sum is σ = 20471268. Its totient is φ = 20471266.

The previous prime is 20471261. The next prime is 20471279. The reversal of 20471267 is 76217402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20471267 - 2¹⁴ = 20454883 is a prime.

It is not a weakly prime, because it can be changed into another prime (20471261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10235633 + 10235634.

It is an arithmetic number, because the mean of its divisors is an integer number (10235634).

Almost surely, 2^20471267 is an apocalyptic number.

20471267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20471267 is an equidigital number, since it uses as much as digits as its factorization.

20471267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 20471267 is about 4524.5184274130. The cubic root of 20471267 is about 273.5572573458.

Adding to 20471267 its reverse (76217402), we get a palindrome (96688669).

The spelling of 20471267 in words is "twenty million, four hundred seventy-one thousand, two hundred sixty-seven".