18894330 has 128 divisors (see below), whose sum is σ = 62092800. Its totient is φ = 3981312.

The previous prime is 18894319. The next prime is 18894347. The reversal of 18894330 is 3349881.

It is a super-2 number, since 2×18894330² = 713991412297800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24186 + ... + 24954.

It is an arithmetic number, because the mean of its divisors is an integer number (485100).

Almost surely, 2^18894330 is an apocalyptic number.

18894330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18894330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31046400).

18894330 is an abundant number, since it is smaller than the sum of its proper divisors (43198470).

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

18894330 is a wasteful number, since it uses less digits than its factorization.

18894330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 18894330 is about 4346.7608629875. The cubic root of 18894330 is about 266.3445607386.

The spelling of 18894330 in words is "eighteen million, eight hundred ninety-four thousand, three hundred thirty".