23403421 has 8 divisors (see below), whose sum is σ = 24768000. Its totient is φ = 22052160.

The previous prime is 23403379. The next prime is 23403431. The reversal of 23403421 is 12430432.

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

It is not a de Polignac number, because 23403421 - 2⁷ = 23403293 is a prime.

It is a super-2 number, since 2×23403421² = 1095440229006482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23403431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (3096000).

Almost surely, 2^23403421 is an apocalyptic number.

It is an amenable number.

23403421 is a deficient number, since it is larger than the sum of its proper divisors (1364579).

23403421 is a wasteful number, since it uses less digits than its factorization.

23403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6659.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23403421 is about 4837.7082384121. The cubic root of 23403421 is about 286.0397885863.

Adding to 23403421 its reverse (12430432), we get a palindrome (35833853).

The spelling of 23403421 in words is "twenty-three million, four hundred three thousand, four hundred twenty-one".