19208603137 has 2 divisors, whose sum is σ = 19208603138. Its totient is φ = 19208603136.

The previous prime is 19208603131. The next prime is 19208603149. The reversal of 19208603137 is 73130680291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18782428401 + 426174736 = 137049^2 + 20644^2 .

It is a cyclic number.

It is not a de Polignac number, because 19208603137 - 2¹⁵ = 19208570369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19208603137.

It is not a weakly prime, because it can be changed into another prime (19208603131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9604301568 + 9604301569.

It is an arithmetic number, because the mean of its divisors is an integer number (9604301569).

Almost surely, 2^19208603137 is an apocalyptic number.

It is an amenable number.

19208603137 is a deficient number, since it is larger than the sum of its proper divisors (1).

19208603137 is an equidigital number, since it uses as much as digits as its factorization.

19208603137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 19208603137 in words is "nineteen billion, two hundred eight million, six hundred three thousand, one hundred thirty-seven".