19072221497864 has 32 divisors (see below), whose sum is σ = 36927406560000. Its totient is φ = 9225136906560.

The previous prime is 19072221497839. The next prime is 19072221497867. The reversal of 19072221497864 is 46879412227091.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a junction number, because it is equal to n+sod(n) for n = 19072221497797 and 19072221497806.

It is not an unprimeable number, because it can be changed into a prime (19072221497867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13305902 + ... + 14669405.

It is an arithmetic number, because the mean of its divisors is an integer number (1153981455000).

Almost surely, 2^{19072221497864} is an apocalyptic number.

It is an amenable number.

19072221497864 is a deficient number, since it is larger than the sum of its proper divisors (17855185062136).

19072221497864 is a wasteful number, since it uses less digits than its factorization.

19072221497864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27978093 (or 27978089 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 19072221497864 in words is "nineteen trillion, seventy-two billion, two hundred twenty-one million, four hundred ninety-seven thousand, eight hundred sixty-four".