23180920 has 48 divisors (see below), whose sum is σ = 60677640. Its totient is φ = 7947072.

The previous prime is 23180909. The next prime is 23180939. The reversal of 23180920 is 2908132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3954 + ... + 7873.

Almost surely, 2^23180920 is an apocalyptic number.

23180920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23180920 is an abundant number, since it is smaller than the sum of its proper divisors (37496720).

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

23180920 is a wasteful number, since it uses less digits than its factorization.

23180920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11852 (or 11841 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 23180920 is about 4814.6567894295. The cubic root of 23180920 is about 285.1304214812.

The spelling of 23180920 in words is "twenty-three million, one hundred eighty thousand, nine hundred twenty".