23503520 has 48 divisors (see below), whose sum is σ = 58800168. Its totient is φ = 8847360.

The previous prime is 23503517. The next prime is 23503541. The reversal of 23503520 is 2530532.

It can be written as a sum of positive squares in 4 ways, for example, as 15460624 + 8042896 = 3932^2 + 2836^2 .

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 = 23503492 and 23503501.

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, 1601 + ... + 7040.

Almost surely, 2^23503520 is an apocalyptic number.

23503520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23503520 is an abundant number, since it is smaller than the sum of its proper divisors (35296648).

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

23503520 is a wasteful number, since it uses less digits than its factorization.

23503520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8673 (or 8665 counting only the distinct ones).

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

The square root of 23503520 is about 4848.0429041006. The cubic root of 23503520 is about 286.4470164065.

The spelling of 23503520 in words is "twenty-three million, five hundred three thousand, five hundred twenty".