19150419217 has 4 divisors (see below), whose sum is σ = 19156621860. Its totient is φ = 19144216576.

The previous prime is 19150419179. The next prime is 19150419227. The reversal of 19150419217 is 71291405191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71291405191 = 70271 ⋅1014521.

It can be written as a sum of positive squares in 2 ways, for example, as 18513412096 + 637007121 = 136064^2 + 25239^2 .

It is a cyclic number.

It is not a de Polignac number, because 19150419217 - 2¹⁵ = 19150386449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19150419217.

It is not an unprimeable number, because it can be changed into a prime (19150419227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3096688 + ... + 3102865.

It is an arithmetic number, because the mean of its divisors is an integer number (4789155465).

Almost surely, 2^19150419217 is an apocalyptic number.

It is an amenable number.

19150419217 is a deficient number, since it is larger than the sum of its proper divisors (6202643).

19150419217 is an equidigital number, since it uses as much as digits as its factorization.

19150419217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202642.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 19150419217 in words is "nineteen billion, one hundred fifty million, four hundred nineteen thousand, two hundred seventeen".