20317667 has 2 divisors, whose sum is σ = 20317668. Its totient is φ = 20317666.

The previous prime is 20317663. The next prime is 20317681. The reversal of 20317667 is 76671302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20317667 - 2² = 20317663 is a prime.

It is not a weakly prime, because it can be changed into another prime (20317663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158833 + 10158834.

It is an arithmetic number, because the mean of its divisors is an integer number (10158834).

Almost surely, 2^20317667 is an apocalyptic number.

20317667 is a deficient number, since it is larger than the sum of its proper divisors (1).

20317667 is an equidigital number, since it uses as much as digits as its factorization.

20317667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20317667 is about 4507.5122850637. The cubic root of 20317667 is about 272.8713540942.

Adding to 20317667 its reverse (76671302), we get a palindrome (96988969).

The spelling of 20317667 in words is "twenty million, three hundred seventeen thousand, six hundred sixty-seven".