18994304 has 128 divisors (see below), whose sum is σ = 48470400. Its totient is φ = 7225344.

The previous prime is 18994303. The next prime is 18994307. The reversal of 18994304 is 40349981.

18994304 = T₁₃₁ + T₁₃₂ + ... + T₄₈₇.

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

It is not an unprimeable number, because it can be changed into a prime (18994303) 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, 441707 + ... + 441749.

It is an arithmetic number, because the mean of its divisors is an integer number (378675).

Almost surely, 2^18994304 is an apocalyptic number.

18994304 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 18994304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24235200).

18994304 is an abundant number, since it is smaller than the sum of its proper divisors (29476096).

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

18994304 is a wasteful number, since it uses less digits than its factorization.

18994304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 18994304 is about 4358.2455185545. The cubic root of 18994304 is about 266.8134969162.

The spelling of 18994304 in words is "eighteen million, nine hundred ninety-four thousand, three hundred four".