18442101 has 8 divisors (see below), whose sum is σ = 24654240. Its totient is φ = 12262352.

The previous prime is 18442097. The next prime is 18442111. The reversal of 18442101 is 10124481.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18442101 - 2² = 18442097 is a prime.

It is a super-2 number, since 2×18442101² = 680222178588402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6735 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (3081780).

Almost surely, 2^18442101 is an apocalyptic number.

It is an amenable number.

18442101 is a deficient number, since it is larger than the sum of its proper divisors (6212139).

18442101 is a wasteful number, since it uses less digits than its factorization.

18442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16195.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 18442101 is about 4294.4267370628. The cubic root of 18442101 is about 264.2024245244.

Adding to 18442101 its reverse (10124481), we get a palindrome (28566582).

The spelling of 18442101 in words is "eighteen million, four hundred forty-two thousand, one hundred one".