18458242 has 16 divisors (see below), whose sum is σ = 30326400. Its totient is φ = 8356240.

The previous prime is 18458233. The next prime is 18458267. The reversal of 18458242 is 24285481.

It is a junction number, because it is equal to n+sod(n) for n = 18458198 and 18458207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4359 + ... + 7477.

It is an arithmetic number, because the mean of its divisors is an integer number (1895400).

Almost surely, 2^18458242 is an apocalyptic number.

18458242 is a deficient number, since it is larger than the sum of its proper divisors (11868158).

18458242 is a wasteful number, since it uses less digits than its factorization.

18458242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401.

The product of its digits is 20480, while the sum is 34.

The square root of 18458242 is about 4296.3056222760. The cubic root of 18458242 is about 264.2794809619.

The spelling of 18458242 in words is "eighteen million, four hundred fifty-eight thousand, two hundred forty-two".