23509437 has 16 divisors (see below), whose sum is σ = 35897472. Its totient is φ = 13406400.

The previous prime is 23509411. The next prime is 23509469. The reversal of 23509437 is 73490532.

It is a happy number.

It is not a de Polignac number, because 23509437 - 2¹⁴ = 23493053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23509398 and 23509407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23509477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13923 + ... + 15519.

It is an arithmetic number, because the mean of its divisors is an integer number (2243592).

Almost surely, 2^23509437 is an apocalyptic number.

It is an amenable number.

23509437 is a deficient number, since it is larger than the sum of its proper divisors (12388035).

23509437 is a wasteful number, since it uses less digits than its factorization.

23509437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 23509437 is about 4848.6531119477. The cubic root of 23509437 is about 286.4710520231.

Adding to 23509437 its reverse (73490532), we get a palindrome (96999969).

The spelling of 23509437 in words is "twenty-three million, five hundred nine thousand, four hundred thirty-seven".