18807745 has 8 divisors (see below), whose sum is σ = 24621120. Its totient is φ = 13678320.

The previous prime is 18807743. The next prime is 18807769. The reversal of 18807745 is 54770881.

18807745 is nontrivially palindromic in base 8.

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

It is not a de Polignac number, because 18807745 - 2¹ = 18807743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18807698 and 18807707.

It is not an unprimeable number, because it can be changed into a prime (18807743) 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, 170925 + ... + 171034.

It is an arithmetic number, because the mean of its divisors is an integer number (3077640).

Almost surely, 2^18807745 is an apocalyptic number.

It is an amenable number.

18807745 is a deficient number, since it is larger than the sum of its proper divisors (5813375).

18807745 is a wasteful number, since it uses less digits than its factorization.

18807745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341975.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 18807745 is about 4336.7897112957. The cubic root of 18807745 is about 265.9370882180.

The spelling of 18807745 in words is "eighteen million, eight hundred seven thousand, seven hundred forty-five".