18843224397534 has 48 divisors (see below), whose sum is σ = 41242222850400. Its totient is φ = 6217306020288.

The previous prime is 18843224397527. The next prime is 18843224397589. The reversal of 18843224397534 is 43579342234881.

It is a happy number.

18843224397534 is a `hidden beast` number, since 1 + 8 + 8 + 4 + 3 + 2 + 2 + 4 + 3 + 97 + 534 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2752914 + ... + 6727925.

It is an arithmetic number, because the mean of its divisors is an integer number (859212976050).

Almost surely, 2^{18843224397534} is an apocalyptic number.

18843224397534 is an abundant number, since it is smaller than the sum of its proper divisors (22398998452866).

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

18843224397534 is a wasteful number, since it uses less digits than its factorization.

18843224397534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481969 (or 9481966 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 63.

The spelling of 18843224397534 in words is "eighteen trillion, eight hundred forty-three billion, two hundred twenty-four million, three hundred ninety-seven thousand, five hundred thirty-four".