23421340 has 24 divisors (see below), whose sum is σ = 49577472. Its totient is φ = 9293760.

The previous prime is 23421331. The next prime is 23421341. The reversal of 23421340 is 4312432.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23421341) 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, 2071 + ... + 7150.

It is an arithmetic number, because the mean of its divisors is an integer number (2065728).

Almost surely, 2^23421340 is an apocalyptic number.

23421340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23421340 is an abundant number, since it is smaller than the sum of its proper divisors (26156132).

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

23421340 is a wasteful number, since it uses less digits than its factorization.

23421340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9357 (or 9355 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23421340 is about 4839.5598973460. The cubic root of 23421340 is about 286.1127727794.

Adding to 23421340 its reverse (4312432), we get a palindrome (27733772).

The spelling of 23421340 in words is "twenty-three million, four hundred twenty-one thousand, three hundred forty".