20320355207 has 2 divisors, whose sum is σ = 20320355208. Its totient is φ = 20320355206.

The previous prime is 20320355203. The next prime is 20320355287. The reversal of 20320355207 is 70255302302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20320355207 - 2² = 20320355203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20320355207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320355203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160177603 + 10160177604.

It is an arithmetic number, because the mean of its divisors is an integer number (10160177604).

Almost surely, 2^20320355207 is an apocalyptic number.

20320355207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320355207 is an equidigital number, since it uses as much as digits as its factorization.

20320355207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 29.

Adding to 20320355207 its reverse (70255302302), we get a palindrome (90575657509).

The spelling of 20320355207 in words is "twenty billion, three hundred twenty million, three hundred fifty-five thousand, two hundred seven".