23197636 has 72 divisors (see below), whose sum is σ = 52553088. Its totient is φ = 8764800.

The previous prime is 23197633. The next prime is 23197663. The reversal of 23197636 is 63679132.

It is a junction number, because it is equal to n+sod(n) for n = 23197595 and 23197604.

It is not an unprimeable number, because it can be changed into a prime (23197633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138825 + ... + 138991.

It is an arithmetic number, because the mean of its divisors is an integer number (729904).

Almost surely, 2^23197636 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 23197636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26276544).

23197636 is an abundant number, since it is smaller than the sum of its proper divisors (29355452).

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

23197636 is a wasteful number, since it uses less digits than its factorization.

23197636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 228 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 23197636 is about 4816.3924258723. The cubic root of 23197636 is about 285.1989418408.

The spelling of 23197636 in words is "twenty-three million, one hundred ninety-seven thousand, six hundred thirty-six".