18234642 has 48 divisors (see below), whose sum is σ = 41070240. Its totient is φ = 5363712.

The previous prime is 18234631. The next prime is 18234691. The reversal of 18234642 is 24643281.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 187938 + ... + 188034.

It is an arithmetic number, because the mean of its divisors is an integer number (855630).

Almost surely, 2^18234642 is an apocalyptic number.

18234642 is an abundant number, since it is smaller than the sum of its proper divisors (22835598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18234642 is a wasteful number, since it uses less digits than its factorization.

18234642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 138 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 18234642 is about 4270.2039763927. The cubic root of 18234642 is about 263.2079971117.

The spelling of 18234642 in words is "eighteen million, two hundred thirty-four thousand, six hundred forty-two".