23105736 has 80 divisors (see below), whose sum is σ = 65405340. Its totient is φ = 7620480.

The previous prime is 23105713. The next prime is 23105783. The reversal of 23105736 is 63750132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23097636 + 8100 = 4806^2 + 90^2 .

It is a super-2 number, since 2×23105736² = 1067750072203392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 117190 + ... + 117386.

Almost surely, 2^23105736 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 23105736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32702670).

23105736 is an abundant number, since it is smaller than the sum of its proper divisors (42299604).

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

23105736 is a wasteful number, since it uses less digits than its factorization.

23105736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 23105736 is about 4806.8426227618. The cubic root of 23105736 is about 284.8218276941.

Adding to 23105736 its reverse (63750132), we get a palindrome (86855868).

The spelling of 23105736 in words is "twenty-three million, one hundred five thousand, seven hundred thirty-six".