23213646 has 24 divisors (see below), whose sum is σ = 50403600. Its totient is φ = 7721376.

The previous prime is 23213639. The next prime is 23213651. The reversal of 23213646 is 64631232.

23213646 is a `hidden beast` number, since 2 + 3 + 2 + 13 + 646 = 666.

It is a super-2 number, since 2×23213646² = 1077746721226632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9706 + ... + 11858.

It is an arithmetic number, because the mean of its divisors is an integer number (2100150).

Almost surely, 2^23213646 is an apocalyptic number.

23213646 is an abundant number, since it is smaller than the sum of its proper divisors (27189954).

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

23213646 is a wasteful number, since it uses less digits than its factorization.

23213646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760 (or 2757 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 23213646 is about 4818.0541715510. The cubic root of 23213646 is about 285.2645373902.

Adding to 23213646 its reverse (64631232), we get a palindrome (87844878).

The spelling of 23213646 in words is "twenty-three million, two hundred thirteen thousand, six hundred forty-six".