23135805 has 72 divisors (see below), whose sum is σ = 50459136. Its totient is φ = 9599040.

The previous prime is 23135803. The next prime is 23135807. The reversal of 23135805 is 50853132.

It is an interprime number because it is at equal distance from previous prime (23135803) and next prime (23135807).

It is not a de Polignac number, because 23135805 - 2¹ = 23135803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23135803) 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 71 ways as a sum of consecutive naturals, for example, 37812 + ... + 38418.

Almost surely, 2^23135805 is an apocalyptic number.

It is an amenable number.

23135805 is an abundant number, since it is smaller than the sum of its proper divisors (27323331).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23135805 is a wasteful number, since it uses less digits than its factorization.

23135805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 23135805 is about 4809.9693346216. The cubic root of 23135805 is about 284.9453265391.

Adding to 23135805 its reverse (50853132), we get a palindrome (73988937).

It can be divided in two parts, 2313 and 5805, that added together give a palindrome (8118).

The spelling of 23135805 in words is "twenty-three million, one hundred thirty-five thousand, eight hundred five".