23161806 has 24 divisors (see below), whose sum is σ = 50454144. Its totient is φ = 7679040.

The previous prime is 23161793. The next prime is 23161813. The reversal of 23161806 is 60816132.

It is a self number, because there is not a number n which added to its sum of digits gives 23161806.

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, 70 + ... + 6806.

It is an arithmetic number, because the mean of its divisors is an integer number (2102256).

Almost surely, 2^23161806 is an apocalyptic number.

23161806 is an abundant number, since it is smaller than the sum of its proper divisors (27292338).

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

23161806 is a wasteful number, since it uses less digits than its factorization.

23161806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6936 (or 6933 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 23161806 is about 4812.6713995452. The cubic root of 23161806 is about 285.0520311282.

Adding to 23161806 its reverse (60816132), we get a palindrome (83977938).

The spelling of 23161806 in words is "twenty-three million, one hundred sixty-one thousand, eight hundred six".