18358309044 has 96 divisors (see below), whose sum is σ = 50635267200. Its totient is φ = 5732052480.

The previous prime is 18358309007. The next prime is 18358309051. The reversal of 18358309044 is 44090385381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363702 + ... + 411090.

It is an arithmetic number, because the mean of its divisors is an integer number (527450700).

Almost surely, 2^18358309044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18358309044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25317633600).

18358309044 is an abundant number, since it is smaller than the sum of its proper divisors (32276958156).

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

18358309044 is a wasteful number, since it uses less digits than its factorization.

18358309044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47630 (or 47622 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 18358309044 in words is "eighteen billion, three hundred fifty-eight million, three hundred nine thousand, forty-four".