23853921 has 64 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 11531520.

The previous prime is 23853917. The next prime is 23853959. The reversal of 23853921 is 12935832.

23853921 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 23853921 - 2² = 23853917 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23853421) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 182026 + ... + 182156.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^23853921 is an apocalyptic number.

23853921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23853921 is a deficient number, since it is larger than the sum of its proper divisors (18723999).

23853921 is a wasteful number, since it uses less digits than its factorization.

23853921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206.

The product of its digits is 12960, while the sum is 33.

The square root of 23853921 is about 4884.0476041906. The cubic root of 23853921 is about 287.8634938546.

The spelling of 23853921 in words is "twenty-three million, eight hundred fifty-three thousand, nine hundred twenty-one".