19042258657 has 2 divisors, whose sum is σ = 19042258658. Its totient is φ = 19042258656.

The previous prime is 19042258621. The next prime is 19042258681. The reversal of 19042258657 is 75685224091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18815334561 + 226924096 = 137169^2 + 15064^2 .

It is a cyclic number.

It is not a de Polignac number, because 19042258657 - 2¹¹ = 19042256609 is a prime.

It is a super-2 number, since 2×19042258657² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19042258657.

It is not a weakly prime, because it can be changed into another prime (19042258687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9521129328 + 9521129329.

It is an arithmetic number, because the mean of its divisors is an integer number (9521129329).

Almost surely, 2^19042258657 is an apocalyptic number.

It is an amenable number.

19042258657 is a deficient number, since it is larger than the sum of its proper divisors (1).

19042258657 is an equidigital number, since it uses as much as digits as its factorization.

19042258657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 19042258657 in words is "nineteen billion, forty-two million, two hundred fifty-eight thousand, six hundred fifty-seven".