23660425 has 6 divisors (see below), whose sum is σ = 29338958. Its totient is φ = 18928320.

The previous prime is 23660423. The next prime is 23660443. The reversal of 23660425 is 52406632.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 273529 + 23386896 = 523^2 + 4836^2 .

It is not a de Polignac number, because 23660425 - 2¹ = 23660423 is a prime.

It is a super-2 number, since 2×23660425² = 1119631422361250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23660393 and 23660402.

It is not an unprimeable number, because it can be changed into a prime (23660423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 473184 + ... + 473233.

Almost surely, 2^23660425 is an apocalyptic number.

23660425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23660425 is a deficient number, since it is larger than the sum of its proper divisors (5678533).

23660425 is an equidigital number, since it uses as much as digits as its factorization.

23660425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946427 (or 946422 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 23660425 is about 4864.1982895437. The cubic root of 23660425 is about 287.0830250233.

The spelling of 23660425 in words is "twenty-three million, six hundred sixty thousand, four hundred twenty-five".