23309530 has 8 divisors (see below), whose sum is σ = 41957172. Its totient is φ = 9323808.

The previous prime is 23309491. The next prime is 23309537. The reversal of 23309530 is 3590332.

It can be written as a sum of positive squares in 2 ways, for example, as 18861649 + 4447881 = 4343^2 + 2109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 23309495 and 23309504.

It is not an unprimeable number, because it can be changed into a prime (23309537) 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, 1165467 + ... + 1165486.

Almost surely, 2^23309530 is an apocalyptic number.

23309530 is a deficient number, since it is larger than the sum of its proper divisors (18647642).

23309530 is a wasteful number, since it uses less digits than its factorization.

23309530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330960.

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 23309530 is about 4827.9944076190. The cubic root of 23309530 is about 285.6567597280.

Adding to 23309530 its reverse (3590332), we get a palindrome (26899862).

The spelling of 23309530 in words is "twenty-three million, three hundred nine thousand, five hundred thirty".