23520016 has 40 divisors (see below), whose sum is σ = 49779800. Its totient is φ = 10699776.

The previous prime is 23519987. The next prime is 23520017. The reversal of 23520016 is 61002532.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 518400 + 23001616 = 720^2 + 4796^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23519975 and 23520002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23520017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14410 + ... + 15958.

It is an arithmetic number, because the mean of its divisors is an integer number (1244495).

Almost surely, 2^23520016 is an apocalyptic number.

23520016 is a gapful number since it is divisible by the number (26) 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 23520016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24889900).

23520016 is an abundant number, since it is smaller than the sum of its proper divisors (26259784).

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

23520016 is a wasteful number, since it uses less digits than its factorization.

23520016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 23520016 is about 4849.7439107648. The cubic root of 23520016 is about 286.5140152354.

Adding to 23520016 its reverse (61002532), we get a palindrome (84522548).

The spelling of 23520016 in words is "twenty-three million, five hundred twenty thousand, sixteen".