23981685 has 32 divisors (see below), whose sum is σ = 47228160. Its totient is φ = 10119168.

The previous prime is 23981647. The next prime is 23981687. The reversal of 23981685 is 58618932.

It is not a de Polignac number, because 23981685 - 2⁶ = 23981621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23981687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7420 + ... + 10149.

It is an arithmetic number, because the mean of its divisors is an integer number (1475880).

Almost surely, 2^23981685 is an apocalyptic number.

It is an amenable number.

23981685 is a deficient number, since it is larger than the sum of its proper divisors (23246475).

23981685 is a wasteful number, since it uses less digits than its factorization.

23981685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17597.

The product of its digits is 103680, while the sum is 42.

The square root of 23981685 is about 4897.1098619492. The cubic root of 23981685 is about 288.3765209421.

The spelling of 23981685 in words is "twenty-three million, nine hundred eighty-one thousand, six hundred eighty-five".