23520820 has 12 divisors (see below), whose sum is σ = 49393764. Its totient is φ = 9408320.

The previous prime is 23520811. The next prime is 23520853. The reversal of 23520820 is 2802532.

It can be written as a sum of positive squares in 2 ways, for example, as 14303524 + 9217296 = 3782^2 + 3036^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23520791 and 23520800.

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 3 ways as a sum of consecutive naturals, for example, 588001 + ... + 588040.

It is an arithmetic number, because the mean of its divisors is an integer number (4116147).

Almost surely, 2^23520820 is an apocalyptic number.

23520820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23520820 is an abundant number, since it is smaller than the sum of its proper divisors (25872944).

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

23520820 is a wasteful number, since it uses less digits than its factorization.

23520820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176050 (or 1176048 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 23520820 is about 4849.8268010311. The cubic root of 23520820 is about 286.5172798965.

The spelling of 23520820 in words is "twenty-three million, five hundred twenty thousand, eight hundred twenty".