18703389 has 8 divisors (see below), whose sum is σ = 25612000. Its totient is φ = 12131856.

The previous prime is 18703387. The next prime is 18703397. The reversal of 18703389 is 98330781.

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

It is not a de Polignac number, because 18703389 - 2¹ = 18703387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18703387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84139 + ... + 84360.

It is an arithmetic number, because the mean of its divisors is an integer number (3201500).

Almost surely, 2^18703389 is an apocalyptic number.

It is an amenable number.

18703389 is a deficient number, since it is larger than the sum of its proper divisors (6908611).

18703389 is a wasteful number, since it uses less digits than its factorization.

18703389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168539.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 18703389 is about 4324.7414951648. The cubic root of 18703389 is about 265.4443192770. Note that the first 3 decimals are identical.

The spelling of 18703389 in words is "eighteen million, seven hundred three thousand, three hundred eighty-nine".