18538101 has 12 divisors (see below), whose sum is σ = 26815360. Its totient is φ = 12341160.

The previous prime is 18538099. The next prime is 18538111. The reversal of 18538101 is 10183581.

It is not a de Polignac number, because 18538101 - 2¹ = 18538099 is a prime.

It is a super-2 number, since 2×18538101² = 687322377372402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18538111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9660 + ... + 11418.

Almost surely, 2^18538101 is an apocalyptic number.

It is an amenable number.

18538101 is a deficient number, since it is larger than the sum of its proper divisors (8277259).

18538101 is a wasteful number, since it uses less digits than its factorization.

18538101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936 (or 2933 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 18538101 is about 4305.5895066762. The cubic root of 18538101 is about 264.6600648979.

The spelling of 18538101 in words is "eighteen million, five hundred thirty-eight thousand, one hundred one".