23432421 has 4 divisors (see below), whose sum is σ = 31243232. Its totient is φ = 15621612.

The previous prime is 23432411. The next prime is 23432429. The reversal of 23432421 is 12423432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23432421 - 2¹⁵ = 23399653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23432429) 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 3 ways as a sum of consecutive naturals, for example, 3905401 + ... + 3905406.

It is an arithmetic number, because the mean of its divisors is an integer number (7810808).

Almost surely, 2^23432421 is an apocalyptic number.

It is an amenable number.

23432421 is a deficient number, since it is larger than the sum of its proper divisors (7810811).

23432421 is an equidigital number, since it uses as much as digits as its factorization.

23432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810810.

The product of its digits is 1152, while the sum is 21.

The square root of 23432421 is about 4840.7045974734. The cubic root of 23432421 is about 286.1578871320.

Adding to 23432421 its reverse (12423432), we get a palindrome (35855853).

The spelling of 23432421 in words is "twenty-three million, four hundred thirty-two thousand, four hundred twenty-one".