23161636 has 12 divisors (see below), whose sum is σ = 41298012. Its totient is φ = 11362208.

The previous prime is 23161613. The next prime is 23161643. The reversal of 23161636 is 63616132.

It can be written as a sum of positive squares in 2 ways, for example, as 12960000 + 10201636 = 3600^2 + 3194^2 .

It is a super-2 number, since 2×23161636² = 1072922764392992, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 54415 + ... + 54838.

It is an arithmetic number, because the mean of its divisors is an integer number (3441501).

Almost surely, 2^23161636 is an apocalyptic number.

It is an amenable number.

23161636 is a deficient number, since it is larger than the sum of its proper divisors (18136376).

23161636 is a wasteful number, since it uses less digits than its factorization.

23161636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109310 (or 109308 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 23161636 is about 4812.6537378041. The cubic root of 23161636 is about 285.0513337306.

Adding to 23161636 its reverse (63616132), we get a palindrome (86777768).

The spelling of 23161636 in words is "twenty-three million, one hundred sixty-one thousand, six hundred thirty-six".