19228496647919 has 4 divisors (see below), whose sum is σ = 20707611774696. Its totient is φ = 17749381521144.

The previous prime is 19228496647891. The next prime is 19228496647931. The reversal of 19228496647919 is 91974669482291.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 19228496647919 - 2¹² = 19228496643823 is a prime.

It is a super-2 number, since 2×19228496647919² (a number of 27 digits) contains 22 as substring.

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 19228496647919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19228496647949) 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, 739557563369 + ... + 739557563394.

It is an arithmetic number, because the mean of its divisors is an integer number (5176902943674).

Almost surely, 2^{19228496647919} is an apocalyptic number.

19228496647919 is a deficient number, since it is larger than the sum of its proper divisors (1479115126777).

19228496647919 is a wasteful number, since it uses less digits than its factorization.

19228496647919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479115126776.

The product of its digits is 846526464, while the sum is 77.

The spelling of 19228496647919 in words is "nineteen trillion, two hundred twenty-eight billion, four hundred ninety-six million, six hundred forty-seven thousand, nine hundred nineteen".