23181072 has 40 divisors (see below), whose sum is σ = 61350240. Its totient is φ = 7537920.

The previous prime is 23181071. The next prime is 23181091. The reversal of 23181072 is 27018132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23181071) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3922 + ... + 7857.

It is an arithmetic number, because the mean of its divisors is an integer number (1533756).

Almost surely, 2^23181072 is an apocalyptic number.

It is an amenable number.

23181072 is an abundant number, since it is smaller than the sum of its proper divisors (38169168).

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

23181072 is a wasteful number, since it uses less digits than its factorization.

23181072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11831 (or 11825 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 23181072 is about 4814.6725745371. The cubic root of 23181072 is about 285.1310446910.

The spelling of 23181072 in words is "twenty-three million, one hundred eighty-one thousand, seventy-two".