23545340 has 96 divisors (see below), whose sum is σ = 64520064. Its totient is φ = 7004160.

The previous prime is 23545339. The next prime is 23545343. The reversal of 23545340 is 4354532.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23545343) 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, 30560 + ... + 31320.

It is an arithmetic number, because the mean of its divisors is an integer number (672084).

Almost surely, 2^23545340 is an apocalyptic number.

23545340 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 23545340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32260032).

23545340 is an abundant number, since it is smaller than the sum of its proper divisors (40974724).

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

23545340 is a wasteful number, since it uses less digits than its factorization.

23545340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 23545340 is about 4852.3540678726. The cubic root of 23545340 is about 286.6168082269.

Adding to 23545340 its reverse (4354532), we get a palindrome (27899872).

The spelling of 23545340 in words is "twenty-three million, five hundred forty-five thousand, three hundred forty".