18702245 has 8 divisors (see below), whose sum is σ = 23216760. Its totient is φ = 14445760.

The previous prime is 18702241. The next prime is 18702253. The reversal of 18702245 is 54220781.

It can be written as a sum of positive squares in 4 ways, for example, as 7739524 + 10962721 = 2782^2 + 3311^2 .

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

It is not a de Polignac number, because 18702245 - 2² = 18702241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18702241) 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, 64346 + ... + 64635.

It is an arithmetic number, because the mean of its divisors is an integer number (2902095).

Almost surely, 2^18702245 is an apocalyptic number.

It is an amenable number.

18702245 is a deficient number, since it is larger than the sum of its proper divisors (4514515).

18702245 is a wasteful number, since it uses less digits than its factorization.

18702245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129015.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 18702245 is about 4324.6092309017. The cubic root of 18702245 is about 265.4389071653.

The spelling of 18702245 in words is "eighteen million, seven hundred two thousand, two hundred forty-five".