18780245 has 8 divisors (see below), whose sum is σ = 24585120. Its totient is φ = 13658320.

The previous prime is 18780241. The next prime is 18780263. The reversal of 18780245 is 54208781.

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

It is not a de Polignac number, because 18780245 - 2² = 18780241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18780241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170675 + ... + 170784.

It is an arithmetic number, because the mean of its divisors is an integer number (3073140).

Almost surely, 2^18780245 is an apocalyptic number.

It is an amenable number.

18780245 is a deficient number, since it is larger than the sum of its proper divisors (5804875).

18780245 is a wasteful number, since it uses less digits than its factorization.

18780245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341475.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 18780245 is about 4333.6180034701. The cubic root of 18780245 is about 265.8074104846.

The spelling of 18780245 in words is "eighteen million, seven hundred eighty thousand, two hundred forty-five".