18964344 has 64 divisors (see below), whose sum is σ = 54604800. Its totient is φ = 5376384.

The previous prime is 18964331. The next prime is 18964349. The reversal of 18964344 is 44346981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18964349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26017 + ... + 26735.

It is an arithmetic number, because the mean of its divisors is an integer number (853200).

Almost surely, 2^18964344 is an apocalyptic number.

18964344 is a gapful number since it is divisible by the number (14) 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 18964344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27302400).

18964344 is an abundant number, since it is smaller than the sum of its proper divisors (35640456).

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

18964344 is a wasteful number, since it uses less digits than its factorization.

18964344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 888 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 18964344 is about 4354.8069991677. The cubic root of 18964344 is about 266.6731401206.

The spelling of 18964344 in words is "eighteen million, nine hundred sixty-four thousand, three hundred forty-four".