18442142 has 8 divisors (see below), whose sum is σ = 28251936. Its totient is φ = 9024832.

The previous prime is 18442139. The next prime is 18442147. The reversal of 18442142 is 24124481.

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

It is a super-2 number, since 2×18442142² = 680225203096328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442147) 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, 98003 + ... + 98190.

It is an arithmetic number, because the mean of its divisors is an integer number (3531492).

Almost surely, 2^18442142 is an apocalyptic number.

18442142 is a deficient number, since it is larger than the sum of its proper divisors (9809794).

18442142 is a wasteful number, since it uses less digits than its factorization.

18442142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196242.

The product of its digits is 2048, while the sum is 26.

The square root of 18442142 is about 4294.4315106892. The cubic root of 18442142 is about 264.2026203136.

The spelling of 18442142 in words is "eighteen million, four hundred forty-two thousand, one hundred forty-two".