23381120 has 128 divisors (see below), whose sum is σ = 67858560. Its totient is φ = 7520256.

The previous prime is 23381119. The next prime is 23381147. The reversal of 23381120 is 2118332.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 23381092 and 23381101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76007 + ... + 76313.

It is an arithmetic number, because the mean of its divisors is an integer number (530145).

Almost surely, 2^23381120 is an apocalyptic number.

23381120 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 23381120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33929280).

23381120 is an abundant number, since it is smaller than the sum of its proper divisors (44477440).

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

23381120 is a wasteful number, since it uses less digits than its factorization.

23381120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 23381120 is about 4835.4027753642. The cubic root of 23381120 is about 285.9489044293.

Adding to 23381120 its reverse (2118332), we get a palindrome (25499452).

The spelling of 23381120 in words is "twenty-three million, three hundred eighty-one thousand, one hundred twenty".