23316540 has 96 divisors (see below), whose sum is σ = 71124480. Its totient is φ = 5673216.

The previous prime is 23316539. The next prime is 23316547. The reversal of 23316540 is 4561332.

It is a happy number.

It is a super-2 number, since 2×23316540² = 1087322075143200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23316540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23316547) 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, 130171 + ... + 130349.

It is an arithmetic number, because the mean of its divisors is an integer number (740880).

Almost surely, 2^23316540 is an apocalyptic number.

23316540 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 23316540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35562240).

23316540 is an abundant number, since it is smaller than the sum of its proper divisors (47807940).

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

23316540 is a wasteful number, since it uses less digits than its factorization.

23316540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 23316540 is about 4828.7203273745. The cubic root of 23316540 is about 285.6853925544.

Adding to 23316540 its reverse (4561332), we get a palindrome (27877872).

The spelling of 23316540 in words is "twenty-three million, three hundred sixteen thousand, five hundred forty".