23530520 has 64 divisors (see below), whose sum is σ = 58605120. Its totient is φ = 8446464.

The previous prime is 23530511. The next prime is 23530547. The reversal of 23530520 is 2503532.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23530492 and 23530501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18629 + ... + 19851.

It is an arithmetic number, because the mean of its divisors is an integer number (915705).

Almost surely, 2^23530520 is an apocalyptic number.

23530520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23530520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29302560).

23530520 is an abundant number, since it is smaller than the sum of its proper divisors (35074600).

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

23530520 is a wasteful number, since it uses less digits than its factorization.

23530520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 23530520 is about 4850.8267336610. The cubic root of 23530520 is about 286.5566611150.

The spelling of 23530520 in words is "twenty-three million, five hundred thirty thousand, five hundred twenty".