20287367 has 2 divisors, whose sum is σ = 20287368. Its totient is φ = 20287366.

The previous prime is 20287363. The next prime is 20287369. The reversal of 20287367 is 76378202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20287367 - 2² = 20287363 is a prime.

Together with 20287369, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20287363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10143683 + 10143684.

It is an arithmetic number, because the mean of its divisors is an integer number (10143684).

Almost surely, 2^20287367 is an apocalyptic number.

20287367 is a deficient number, since it is larger than the sum of its proper divisors (1).

20287367 is an equidigital number, since it uses as much as digits as its factorization.

20287367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 20287367 is about 4504.1499753006. The cubic root of 20287367 is about 272.7356410799.

The spelling of 20287367 in words is "twenty million, two hundred eighty-seven thousand, three hundred sixty-seven".