23421000 has 128 divisors (see below), whose sum is σ = 75404160. Its totient is φ = 6048000.

The previous prime is 23420933. The next prime is 23421001. The reversal of 23421000 is 12432.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110895 + ... + 111105.

It is an arithmetic number, because the mean of its divisors is an integer number (589095).

Almost surely, 2^23421000 is an apocalyptic number.

23421000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37702080).

23421000 is an abundant number, since it is smaller than the sum of its proper divisors (51983160).

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

23421000 is a wasteful number, since it uses less digits than its factorization.

23421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 23421000 is about 4839.5247700575. The cubic root of 23421000 is about 286.1113883039. Note that the first 3 decimals are identical.

Adding to 23421000 its reverse (12432), we get a palindrome (23433432).

The spelling of 23421000 in words is "twenty-three million, four hundred twenty-one thousand".