20685367 has 2 divisors, whose sum is σ = 20685368. Its totient is φ = 20685366.

The previous prime is 20685337. The next prime is 20685373. The reversal of 20685367 is 76358602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20685367 - 2⁷ = 20685239 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 (20685307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10342683 + 10342684.

It is an arithmetic number, because the mean of its divisors is an integer number (10342684).

Almost surely, 2^20685367 is an apocalyptic number.

20685367 is a deficient number, since it is larger than the sum of its proper divisors (1).

20685367 is an equidigital number, since it uses as much as digits as its factorization.

20685367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20685367 is about 4548.1168630544. The cubic root of 20685367 is about 274.5076236294.

The spelling of 20685367 in words is "twenty million, six hundred eighty-five thousand, three hundred sixty-seven".