23320136 has 32 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 9879936.

The previous prime is 23320133. The next prime is 23320151. The reversal of 23320136 is 63102332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23320133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2645 + ... + 7323.

It is an arithmetic number, because the mean of its divisors is an integer number (1579500).

Almost surely, 2^23320136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23320136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25272000).

23320136 is an abundant number, since it is smaller than the sum of its proper divisors (27223864).

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

23320136 is a wasteful number, since it uses less digits than its factorization.

23320136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781 (or 4777 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 23320136 is about 4829.0926684006. The cubic root of 23320136 is about 285.7000784364.

Adding to 23320136 its reverse (63102332), we get a palindrome (86422468).

The spelling of 23320136 in words is "twenty-three million, three hundred twenty thousand, one hundred thirty-six".