18489430 has 8 divisors (see below), whose sum is σ = 33280992. Its totient is φ = 7395768.

The previous prime is 18489409. The next prime is 18489431. The reversal of 18489430 is 3498481.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18489430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18489431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924462 + ... + 924481.

It is an arithmetic number, because the mean of its divisors is an integer number (4160124).

Almost surely, 2^18489430 is an apocalyptic number.

18489430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18489430 is a deficient number, since it is larger than the sum of its proper divisors (14791562).

18489430 is a wasteful number, since it uses less digits than its factorization.

18489430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848950.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18489430 is about 4299.9337204194. The cubic root of 18489430 is about 264.4282439657.

The spelling of 18489430 in words is "eighteen million, four hundred eighty-nine thousand, four hundred thirty".