23109320 has 64 divisors (see below), whose sum is σ = 58968000. Its totient is φ = 8080128.

The previous prime is 23109313. The next prime is 23109343. The reversal of 23109320 is 2390132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23109292 and 23109301.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8711 + ... + 11049.

It is an arithmetic number, because the mean of its divisors is an integer number (921375).

Almost surely, 2^23109320 is an apocalyptic number.

23109320 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 23109320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29484000).

23109320 is an abundant number, since it is smaller than the sum of its proper divisors (35858680).

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

23109320 is a wasteful number, since it uses less digits than its factorization.

23109320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 23109320 is about 4807.2154101933. The cubic root of 23109320 is about 284.8365534554.

Adding to 23109320 its reverse (2390132), we get a palindrome (25499452).

The spelling of 23109320 in words is "twenty-three million, one hundred nine thousand, three hundred twenty".