2138203018507 has 2 divisors, whose sum is σ = 2138203018508. Its totient is φ = 2138203018506.

The previous prime is 2138203018387. The next prime is 2138203018519. The reversal of 2138203018507 is 7058103028312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2138203018507 - 2²³ = 2138194629899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2138203018507.

It is not a weakly prime, because it can be changed into another prime (2138203018537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069101509253 + 1069101509254.

It is an arithmetic number, because the mean of its divisors is an integer number (1069101509254).

Almost surely, 2^{2138203018507} is an apocalyptic number.

2138203018507 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138203018507 is an equidigital number, since it uses as much as digits as its factorization.

2138203018507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 2138203018507 in words is "two trillion, one hundred thirty-eight billion, two hundred three million, eighteen thousand, five hundred seven".