20380207 has 2 divisors, whose sum is σ = 20380208. Its totient is φ = 20380206.

The previous prime is 20380177. The next prime is 20380211. The reversal of 20380207 is 70208302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20380207 - 2⁷ = 20380079 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 (20380267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190103 + 10190104.

It is an arithmetic number, because the mean of its divisors is an integer number (10190104).

Almost surely, 2^20380207 is an apocalyptic number.

20380207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20380207 is an equidigital number, since it uses as much as digits as its factorization.

20380207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20380207 is about 4514.4442625865. Note that the first 3 decimals coincide. The cubic root of 20380207 is about 273.1510432710.

Adding to 20380207 its reverse (70208302), we get a palindrome (90588509).

The spelling of 20380207 in words is "twenty million, three hundred eighty thousand, two hundred seven".