23408421 has 8 divisors (see below), whose sum is σ = 31235904. Its totient is φ = 15593280.

The previous prime is 23408419. The next prime is 23408447. The reversal of 23408421 is 12480432.

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

It is not a de Polignac number, because 23408421 - 2¹ = 23408419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23408391 and 23408400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23408461) 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 7 ways as a sum of consecutive naturals, for example, 3136 + ... + 7526.

It is an arithmetic number, because the mean of its divisors is an integer number (3904488).

Almost surely, 2^23408421 is an apocalyptic number.

It is an amenable number.

23408421 is a deficient number, since it is larger than the sum of its proper divisors (7827483).

23408421 is a wasteful number, since it uses less digits than its factorization.

23408421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 23408421 is about 4838.2249844339. The cubic root of 23408421 is about 286.0601573621.

Adding to 23408421 its reverse (12480432), we get a palindrome (35888853).

The spelling of 23408421 in words is "twenty-three million, four hundred eight thousand, four hundred twenty-one".