23312421 has 32 divisors (see below), whose sum is σ = 38413440. Its totient is φ = 13852800.

The previous prime is 23312351. The next prime is 23312441. The reversal of 23312421 is 12421332.

23312421 is a `hidden beast` number, since 233 + 12 + 421 = 666.

It is not a de Polignac number, because 23312421 - 2⁹ = 23311909 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23312394 and 23312403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23312441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15001 + ... + 16481.

It is an arithmetic number, because the mean of its divisors is an integer number (1200420).

Almost surely, 2^23312421 is an apocalyptic number.

It is an amenable number.

23312421 is a deficient number, since it is larger than the sum of its proper divisors (15101019).

23312421 is a wasteful number, since it uses less digits than its factorization.

23312421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1548 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 23312421 is about 4828.2937980202. The cubic root of 23312421 is about 285.6685689115.

Adding to 23312421 its reverse (12421332), we get a palindrome (35733753).

The spelling of 23312421 in words is "twenty-three million, three hundred twelve thousand, four hundred twenty-one".