23181120 has 112 divisors (see below), whose sum is σ = 81808320. Its totient is φ = 6179328.

The previous prime is 23181091. The next prime is 23181131. The reversal of 23181120 is 2118132.

23181120 = T₁₁₅ + T₁₁₆ + ... + T₅₁₉.

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 = 23181093 and 23181102.

It is a congruent number.

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, 7299 + ... + 9981.

Almost surely, 2^23181120 is an apocalyptic number.

23181120 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 23181120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40904160).

23181120 is an abundant number, since it is smaller than the sum of its proper divisors (58627200).

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

23181120 is a wasteful number, since it uses less digits than its factorization.

23181120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 23181120 is about 4814.6775592972. The cubic root of 23181120 is about 285.1312414935.

Adding to 23181120 its reverse (2118132), we get a palindrome (25299252).

The spelling of 23181120 in words is "twenty-three million, one hundred eighty-one thousand, one hundred twenty".