18524945 has 8 divisors (see below), whose sum is σ = 22263336. Its totient is φ = 14797696.

The previous prime is 18524941. The next prime is 18524969. The reversal of 18524945 is 54942581.

It can be written as a sum of positive squares in 4 ways, for example, as 1227664 + 17297281 = 1108^2 + 4159^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18524945 - 2² = 18524941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18524899 and 18524908.

It is not an unprimeable number, because it can be changed into a prime (18524941) 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, 1469 + ... + 6261.

It is an arithmetic number, because the mean of its divisors is an integer number (2782917).

Almost surely, 2^18524945 is an apocalyptic number.

It is an amenable number.

18524945 is a deficient number, since it is larger than the sum of its proper divisors (3738391).

18524945 is an equidigital number, since it uses as much as digits as its factorization.

18524945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571.

The product of its digits is 57600, while the sum is 38.

The square root of 18524945 is about 4304.0614540222. The cubic root of 18524945 is about 264.5974426656.

The spelling of 18524945 in words is "eighteen million, five hundred twenty-four thousand, nine hundred forty-five".