18435642 has 8 divisors (see below), whose sum is σ = 36871296. Its totient is φ = 6145212.

The previous prime is 18435623. The next prime is 18435649. The reversal of 18435642 is 24653481.

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

18435642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18435649) 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, 1536298 + ... + 1536309.

It is an arithmetic number, because the mean of its divisors is an integer number (4608912).

Almost surely, 2^18435642 is an apocalyptic number.

18435642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18435642 is a wasteful number, since it uses less digits than its factorization.

18435642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072612.

The product of its digits is 23040, while the sum is 33.

The square root of 18435642 is about 4293.6746499939. The cubic root of 18435642 is about 264.1715769415.

The spelling of 18435642 in words is "eighteen million, four hundred thirty-five thousand, six hundred forty-two".