18046844928 has 544 divisors, whose sum is σ = 64424017920. Its totient is φ = 4883742720.

The previous prime is 18046844903. The next prime is 18046844939. The reversal of 18046844928 is 82944864081.

It is a happy number.

It is a super-2 number, since 2×18046844928² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 383975401 + ... + 383975447.

Almost surely, 2^18046844928 is an apocalyptic number.

18046844928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18046844928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32212008960).

18046844928 is an abundant number, since it is smaller than the sum of its proper divisors (46377172992).

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

18046844928 is an frugal number, since it uses more digits than its factorization.

18046844928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 54.

The spelling of 18046844928 in words is "eighteen billion, forty-six million, eight hundred forty-four thousand, nine hundred twenty-eight".