18412051944 has 128 divisors (see below), whose sum is σ = 54613802880. Its totient is φ = 5099136000.

The previous prime is 18412051939. The next prime is 18412051961. The reversal of 18412051944 is 44915021481.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320074 + ... + 373190.

It is an arithmetic number, because the mean of its divisors is an integer number (426670335).

Almost surely, 2^18412051944 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 18412051944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27306901440).

18412051944 is an abundant number, since it is smaller than the sum of its proper divisors (36201750936).

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

18412051944 is a wasteful number, since it uses less digits than its factorization.

18412051944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53251 (or 53247 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 18412051944 in words is "eighteen billion, four hundred twelve million, fifty-one thousand, nine hundred forty-four".