23520042 has 96 divisors (see below), whose sum is σ = 63842688. Its totient is φ = 6092928.

The previous prime is 23520031. The next prime is 23520059. The reversal of 23520042 is 24002532.

It is a super-3 number, since 3×23520042³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23519997 and 23520024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135868 + ... + 136040.

It is an arithmetic number, because the mean of its divisors is an integer number (665028).

Almost surely, 2^23520042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23520042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31921344).

23520042 is an abundant number, since it is smaller than the sum of its proper divisors (40322646).

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

23520042 is a wasteful number, since it uses less digits than its factorization.

23520042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 23520042 is about 4849.7465913179. The cubic root of 23520042 is about 286.5141208102.

Adding to 23520042 its reverse (24002532), we get a palindrome (47522574).

The spelling of 23520042 in words is "twenty-three million, five hundred twenty thousand, forty-two".