23518040 has 144 divisors (see below), whose sum is σ = 67592880. Its totient is φ = 7338240.

The previous prime is 23518039. The next prime is 23518069. The reversal of 23518040 is 4081532.

It is a junction number, because it is equal to n+sod(n) for n = 23517997 and 23518015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 331205 + ... + 331275.

It is an arithmetic number, because the mean of its divisors is an integer number (469395).

Almost surely, 2^23518040 is an apocalyptic number.

23518040 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 23518040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33796440).

23518040 is an abundant number, since it is smaller than the sum of its proper divisors (44074840).

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

23518040 is a wasteful number, since it uses less digits than its factorization.

23518040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 23518040 is about 4849.5401843886. The cubic root of 23518040 is about 286.5059913243.

Adding to 23518040 its reverse (4081532), we get a palindrome (27599572).

The spelling of 23518040 in words is "twenty-three million, five hundred eighteen thousand, forty".