23506406 has 16 divisors (see below), whose sum is σ = 43960320. Its totient is φ = 9158280.

The previous prime is 23506381. The next prime is 23506409. The reversal of 23506406 is 60460532.

It is a super-2 number, since 2×23506406² = 1105102246073672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23506409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76166 + ... + 76473.

It is an arithmetic number, because the mean of its divisors is an integer number (2747520).

Almost surely, 2^23506406 is an apocalyptic number.

23506406 is a deficient number, since it is larger than the sum of its proper divisors (20453914).

23506406 is a wasteful number, since it uses less digits than its factorization.

23506406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152659.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 23506406 is about 4848.3405408449. The cubic root of 23506406 is about 286.4587402144.

Adding to 23506406 its reverse (60460532), we get a palindrome (83966938).

The spelling of 23506406 in words is "twenty-three million, five hundred six thousand, four hundred six".