23145730 has 16 divisors (see below), whose sum is σ = 42679224. Its totient is φ = 9032320.

The previous prime is 23145713. The next prime is 23145791. The reversal of 23145730 is 3754132.

It can be written as a sum of positive squares in 4 ways, for example, as 13417569 + 9728161 = 3663^2 + 3119^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23145695 and 23145704.

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, 27817 + ... + 28636.

Almost surely, 2^23145730 is an apocalyptic number.

23145730 is a deficient number, since it is larger than the sum of its proper divisors (19533494).

23145730 is a wasteful number, since it uses less digits than its factorization.

23145730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56501.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 23145730 is about 4811.0009353564. Note that the first 3 decimals coincide. The cubic root of 23145730 is about 284.9860668268.

Adding to 23145730 its reverse (3754132), we get a palindrome (26899862).

The spelling of 23145730 in words is "twenty-three million, one hundred forty-five thousand, seven hundred thirty".