18439219154322 has 54 divisors (see below), whose sum is σ = 40054178043477. Its totient is φ = 6130671858432.

The previous prime is 18439219154309. The next prime is 18439219154333. The reversal of 18439219154322 is 22345191293481.

18439219154322 is a `hidden beast` number, since 1 + 8 + 4 + 3 + 9 + 2 + 1 + 91 + 543 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9786567465801 + 8652651688521 = 3128349^2 + 2941539^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3036381.

It is a super-2 number, since 2×18439219154322² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8726557938 + ... + 8726560050.

Almost surely, 2^{18439219154322} is an apocalyptic number.

18439219154322 is an abundant number, since it is smaller than the sum of its proper divisors (21614958889155).

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

18439219154322 is an frugal number, since it uses more digits than its factorization.

18439219154322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5192 (or 2597 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 18439219154322 in words is "eighteen trillion, four hundred thirty-nine billion, two hundred nineteen million, one hundred fifty-four thousand, three hundred twenty-two".