19155825019 has 2 divisors, whose sum is σ = 19155825020. Its totient is φ = 19155825018.

The previous prime is 19155825001. The next prime is 19155825077. The reversal of 19155825019 is 91052855191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19155825019 - 2²¹ = 19153727867 is a prime.

It is a super-2 number, since 2×19155825019² (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 19155825019.

It is not a weakly prime, because it can be changed into another prime (19155829019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9577912509 + 9577912510.

It is an arithmetic number, because the mean of its divisors is an integer number (9577912510).

Almost surely, 2^19155825019 is an apocalyptic number.

19155825019 is a deficient number, since it is larger than the sum of its proper divisors (1).

19155825019 is an equidigital number, since it uses as much as digits as its factorization.

19155825019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 46.

The spelling of 19155825019 in words is "nineteen billion, one hundred fifty-five million, eight hundred twenty-five thousand, nineteen".