18903345 has 8 divisors (see below), whose sum is σ = 30245376. Its totient is φ = 10081776.

The previous prime is 18903343. The next prime is 18903373. The reversal of 18903345 is 54330981.

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

It is not a de Polignac number, because 18903345 - 2¹ = 18903343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18903343) 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, 630097 + ... + 630126.

It is an arithmetic number, because the mean of its divisors is an integer number (3780672).

Almost surely, 2^18903345 is an apocalyptic number.

18903345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18903345 is a deficient number, since it is larger than the sum of its proper divisors (11342031).

18903345 is a wasteful number, since it uses less digits than its factorization.

18903345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260231.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 18903345 is about 4347.7977183857. The cubic root of 18903345 is about 266.3869140873.

The spelling of 18903345 in words is "eighteen million, nine hundred three thousand, three hundred forty-five".