18564242 has 8 divisors (see below), whose sum is σ = 28031232. Its totient is φ = 9220500.

The previous prime is 18564241. The next prime is 18564251. The reversal of 18564242 is 24246581.

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

It is a junction number, because it is equal to n+sod(n) for n = 18564199 and 18564208.

It is not an unprimeable number, because it can be changed into a prime (18564241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30434 + ... + 31037.

It is an arithmetic number, because the mean of its divisors is an integer number (3503904).

Almost surely, 2^18564242 is an apocalyptic number.

18564242 is a deficient number, since it is larger than the sum of its proper divisors (9466990).

18564242 is a wasteful number, since it uses less digits than its factorization.

18564242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61624.

The product of its digits is 15360, while the sum is 32.

The square root of 18564242 is about 4308.6241423452. The cubic root of 18564242 is about 264.7844075393.

The spelling of 18564242 in words is "eighteen million, five hundred sixty-four thousand, two hundred forty-two".