23838381 has 20 divisors (see below), whose sum is σ = 40698592. Its totient is φ = 13621608.

The previous prime is 23838371. The next prime is 23838389. The reversal of 23838381 is 18383832.

It is not a de Polignac number, because 23838381 - 2⁶ = 23838317 is a prime.

It is a super-2 number, since 2×23838381² = 1136536817402322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23838389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20455 + ... + 21588.

Almost surely, 2^23838381 is an apocalyptic number.

23838381 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23838381 is a deficient number, since it is larger than the sum of its proper divisors (16860211).

23838381 is an equidigital number, since it uses as much as digits as its factorization.

23838381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42062 (or 42053 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 23838381 is about 4882.4564514187. The cubic root of 23838381 is about 287.8009692566.

It can be divided in two parts, 2 and 3838381, that added together give a palindrome (3838383).

The spelling of 23838381 in words is "twenty-three million, eight hundred thirty-eight thousand, three hundred eighty-one".