19049813357 has 2 divisors, whose sum is σ = 19049813358. Its totient is φ = 19049813356.

The previous prime is 19049813339. The next prime is 19049813371. The reversal of 19049813357 is 75331894091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18789281476 + 260531881 = 137074^2 + 16141^2 .

It is a cyclic number.

It is not a de Polignac number, because 19049813357 - 2¹⁰ = 19049812333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19049819357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9524906678 + 9524906679.

It is an arithmetic number, because the mean of its divisors is an integer number (9524906679).

Almost surely, 2^19049813357 is an apocalyptic number.

It is an amenable number.

19049813357 is a deficient number, since it is larger than the sum of its proper divisors (1).

19049813357 is an equidigital number, since it uses as much as digits as its factorization.

19049813357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 19049813357 in words is "nineteen billion, forty-nine million, eight hundred thirteen thousand, three hundred fifty-seven".