18889330 has 8 divisors (see below), whose sum is σ = 34000812. Its totient is φ = 7555728.

The previous prime is 18889313. The next prime is 18889369. The reversal of 18889330 is 3398881.

It can be written as a sum of positive squares in 2 ways, for example, as 18757561 + 131769 = 4331^2 + 363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944457 + ... + 944476.

Almost surely, 2^18889330 is an apocalyptic number.

18889330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18889330 is a deficient number, since it is larger than the sum of its proper divisors (15111482).

18889330 is a wasteful number, since it uses less digits than its factorization.

18889330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888940.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 18889330 is about 4346.1856840223. The cubic root of 18889330 is about 266.3210644429.

The spelling of 18889330 in words is "eighteen million, eight hundred eighty-nine thousand, three hundred thirty".