23630521 has 4 divisors (see below), whose sum is σ = 24180112. Its totient is φ = 23080932.

The previous prime is 23630513. The next prime is 23630539. The reversal of 23630521 is 12503632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23630521 - 2³ = 23630513 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23630492 and 23630501.

It is not an unprimeable number, because it can be changed into a prime (23630021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274731 + ... + 274816.

It is an arithmetic number, because the mean of its divisors is an integer number (6045028).

Almost surely, 2^23630521 is an apocalyptic number.

It is an amenable number.

23630521 is a deficient number, since it is larger than the sum of its proper divisors (549591).

23630521 is an equidigital number, since it uses as much as digits as its factorization.

23630521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549590.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 23630521 is about 4861.1234298257. The cubic root of 23630521 is about 286.9620276179.

The spelling of 23630521 in words is "twenty-three million, six hundred thirty thousand, five hundred twenty-one".