20097907 has 2 divisors, whose sum is σ = 20097908. Its totient is φ = 20097906.

The previous prime is 20097901. The next prime is 20097911. The reversal of 20097907 is 70979002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20097907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20097901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10048953 + 10048954.

It is an arithmetic number, because the mean of its divisors is an integer number (10048954).

Almost surely, 2^20097907 is an apocalyptic number.

20097907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20097907 is an equidigital number, since it uses as much as digits as its factorization.

20097907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 20097907 is about 4483.0689265279. The cubic root of 20097907 is about 271.8839749889.

The spelling of 20097907 in words is "twenty million, ninety-seven thousand, nine hundred seven".