23400421 has 8 divisors (see below), whose sum is σ = 25621344. Its totient is φ = 21195120.

The previous prime is 23400413. The next prime is 23400427. The reversal of 23400421 is 12400432.

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

It is a cyclic number.

It is not a de Polignac number, because 23400421 - 2³ = 23400413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23400395 and 23400404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23400427) 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, 646 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (3202668).

Almost surely, 2^23400421 is an apocalyptic number.

It is an amenable number.

23400421 is a deficient number, since it is larger than the sum of its proper divisors (2220923).

23400421 is a wasteful number, since it uses less digits than its factorization.

23400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7811.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 23400421 is about 4837.3981643028. The cubic root of 23400421 is about 286.0275659283.

Adding to 23400421 its reverse (12400432), we get a palindrome (35800853).

The spelling of 23400421 in words is "twenty-three million, four hundred thousand, four hundred twenty-one".