20097767 has 2 divisors, whose sum is σ = 20097768. Its totient is φ = 20097766.

The previous prime is 20097751. The next prime is 20097769. The reversal of 20097767 is 76779002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20097767 - 2⁴ = 20097751 is a prime.

Together with 20097769, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20097767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20097769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10048883 + 10048884.

It is an arithmetic number, because the mean of its divisors is an integer number (10048884).

Almost surely, 2^20097767 is an apocalyptic number.

20097767 is a deficient number, since it is larger than the sum of its proper divisors (1).

20097767 is an equidigital number, since it uses as much as digits as its factorization.

20097767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 20097767 is about 4483.0533121969. The cubic root of 20097767 is about 271.8833436819.

The spelling of 20097767 in words is "twenty million, ninety-seven thousand, seven hundred sixty-seven".