20388742207 has 2 divisors, whose sum is σ = 20388742208. Its totient is φ = 20388742206.

The previous prime is 20388742177. The next prime is 20388742223. The reversal of 20388742207 is 70224788302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20388742207 - 2⁷ = 20388742079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20388742007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10194371103 + 10194371104.

It is an arithmetic number, because the mean of its divisors is an integer number (10194371104).

Almost surely, 2^20388742207 is an apocalyptic number.

20388742207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20388742207 is an equidigital number, since it uses as much as digits as its factorization.

20388742207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 20388742207 in words is "twenty billion, three hundred eighty-eight million, seven hundred forty-two thousand, two hundred seven".