20302207 has 2 divisors, whose sum is σ = 20302208. Its totient is φ = 20302206.

The previous prime is 20302189. The next prime is 20302211. The reversal of 20302207 is 70220302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20302207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20302277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151103 + 10151104.

It is an arithmetic number, because the mean of its divisors is an integer number (10151104).

Almost surely, 2^20302207 is an apocalyptic number.

20302207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302207 is an equidigital number, since it uses as much as digits as its factorization.

20302207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 20302207 is about 4505.7970438092. The cubic root of 20302207 is about 272.8021259756.

Adding to 20302207 its reverse (70220302), we get a palindrome (90522509).

The spelling of 20302207 in words is "twenty million, three hundred two thousand, two hundred seven".