23003520 has 64 divisors (see below), whose sum is σ = 73329840. Its totient is φ = 6133760.

The previous prime is 23003459. The next prime is 23003531. The reversal of 23003520 is 2530032.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23003520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4071 + ... + 7910.

Almost surely, 2^23003520 is an apocalyptic number.

23003520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23003520 is an abundant number, since it is smaller than the sum of its proper divisors (50326320).

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

23003520 is a wasteful number, since it uses less digits than its factorization.

23003520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12003 (or 11991 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 23003520 is about 4796.1984946414. The cubic root of 23003520 is about 284.4012050883.

Adding to 23003520 its reverse (2530032), we get a palindrome (25533552).

The spelling of 23003520 in words is "twenty-three million, three thousand, five hundred twenty".