23031120 has 80 divisors (see below), whose sum is σ = 81601920. Its totient is φ = 5263872.

The previous prime is 23031103. The next prime is 23031121. The reversal of 23031120 is 2113032.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 23031096 and 23031105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5175 + ... + 8534.

It is an arithmetic number, because the mean of its divisors is an integer number (1020024).

Almost surely, 2^23031120 is an apocalyptic number.

23031120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23031120 is an abundant number, since it is smaller than the sum of its proper divisors (58570800).

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

23031120 is a wasteful number, since it uses less digits than its factorization.

23031120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13732 (or 13726 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 23031120 is about 4799.0749108552. The cubic root of 23031120 is about 284.5149027027.

Adding to 23031120 its reverse (2113032), we get a palindrome (25144152).

The spelling of 23031120 in words is "twenty-three million, thirty-one thousand, one hundred twenty".