18994560 has 128 divisors (see below), whose sum is σ = 65288160. Its totient is φ = 4669440.

The previous prime is 18994541. The next prime is 18994561. The reversal of 18994560 is 6549981.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18994561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24580 + ... + 25340.

Almost surely, 2^18994560 is an apocalyptic number.

18994560 is a gapful number since it is divisible by the number (10) 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 18994560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32644080).

18994560 is an abundant number, since it is smaller than the sum of its proper divisors (46293600).

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

18994560 is a wasteful number, since it uses less digits than its factorization.

18994560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 18994560 is about 4358.2748880721. The cubic root of 18994560 is about 266.8146955905.

It can be divided in two parts, 189 and 94560, that added together give a palindrome (94749).

The spelling of 18994560 in words is "eighteen million, nine hundred ninety-four thousand, five hundred sixty".