23421006 has 48 divisors (see below), whose sum is σ = 58426368. Its totient is φ = 6642000.

The previous prime is 23421001. The next prime is 23421017. The reversal of 23421006 is 60012432.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 23421006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23421001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18411 + ... + 19641.

It is an arithmetic number, because the mean of its divisors is an integer number (1217216).

Almost surely, 2^23421006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23421006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29213184).

23421006 is an abundant number, since it is smaller than the sum of its proper divisors (35005362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23421006 is a wasteful number, since it uses less digits than its factorization.

23421006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397 (or 1394 counting only the distinct ones).

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

The square root of 23421006 is about 4839.5253899530. The cubic root of 23421006 is about 286.1114127359. Note that the first 3 decimals are identical.

Adding to 23421006 its reverse (60012432), we get a palindrome (83433438).

The spelling of 23421006 in words is "twenty-three million, four hundred twenty-one thousand, six".