18469944 has 56 divisors (see below), whose sum is σ = 51939360. Its totient is φ = 6154704.

The previous prime is 18469933. The next prime is 18470003. The reversal of 18469944 is 44996481.

It is a super-2 number, since 2×18469944² = 682277662726272, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18469944.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4249 + ... + 7415.

Almost surely, 2^18469944 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 18469944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25969680).

18469944 is an abundant number, since it is smaller than the sum of its proper divisors (33469416).

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

18469944 is an equidigital number, since it uses as much as digits as its factorization.

18469944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191 (or 3172 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 18469944 is about 4297.6672742315. The cubic root of 18469944 is about 264.3353177199.

The spelling of 18469944 in words is "eighteen million, four hundred sixty-nine thousand, nine hundred forty-four".