19218845458848 has 96 divisors (see below), whose sum is σ = 57660474243456. Its totient is φ = 5490723667968.

The previous prime is 19218845458843. The next prime is 19218845458927. The reversal of 19218845458848 is 84885454881291.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×19218845458848² (a number of 27 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 19218845458848.

It is not an unprimeable number, because it can be changed into a prime (19218845458843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8944740 + ... + 10883292.

It is an arithmetic number, because the mean of its divisors is an integer number (600629940036).

Almost surely, 2^{19218845458848} is an apocalyptic number.

It is an amenable number.

19218845458848 is an abundant number, since it is smaller than the sum of its proper divisors (38441628784608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19218845458848 is a wasteful number, since it uses less digits than its factorization.

19218845458848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953326 (or 1953318 counting only the distinct ones).

The product of its digits is 943718400, while the sum is 75.

The spelling of 19218845458848 in words is "nineteen trillion, two hundred eighteen billion, eight hundred forty-five million, four hundred fifty-eight thousand, eight hundred forty-eight".