23873421 has 24 divisors (see below), whose sum is σ = 37686880. Its totient is φ = 13353120.

The previous prime is 23873419. The next prime is 23873429. The reversal of 23873421 is 12437832.

It is not a de Polignac number, because 23873421 - 2¹ = 23873419 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23873429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2190 + ... + 7248.

Almost surely, 2^23873421 is an apocalyptic number.

It is an amenable number.

23873421 is a deficient number, since it is larger than the sum of its proper divisors (13813459).

23873421 is a wasteful number, since it uses less digits than its factorization.

23873421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097 (or 5086 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 23873421 is about 4886.0434914151. The cubic root of 23873421 is about 287.9419129572.

The spelling of 23873421 in words is "twenty-three million, eight hundred seventy-three thousand, four hundred twenty-one".