23145136 has 40 divisors (see below), whose sum is σ = 51559200. Its totient is φ = 9859584.

The previous prime is 23145119. The next prime is 23145167. The reversal of 23145136 is 63154132.

It is a self number, because there is not a number n which added to its sum of digits gives 23145136.

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, 21540 + ... + 22588.

It is an arithmetic number, because the mean of its divisors is an integer number (1288980).

Almost surely, 2^23145136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23145136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25779600).

23145136 is an abundant number, since it is smaller than the sum of its proper divisors (28414064).

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

23145136 is a wasteful number, since it uses less digits than its factorization.

23145136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261 (or 1255 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 23145136 is about 4810.9392014450. The cubic root of 23145136 is about 284.9836288944.

Adding to 23145136 its reverse (63154132), we get a palindrome (86299268).

The spelling of 23145136 in words is "twenty-three million, one hundred forty-five thousand, one hundred thirty-six".