185840013 has 8 divisors (see below), whose sum is σ = 247856800. Its totient is φ = 123858288.

The previous prime is 185839999. The next prime is 185840047. The reversal of 185840013 is 310048581.

185840013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 185840013 - 2⁵ = 185839981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185840093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8418 + ... + 21036.

It is an arithmetic number, because the mean of its divisors is an integer number (30982100).

Almost surely, 2^185840013 is an apocalyptic number.

It is an amenable number.

185840013 is a deficient number, since it is larger than the sum of its proper divisors (62016787).

185840013 is a wasteful number, since it uses less digits than its factorization.

185840013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17531.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 185840013 is about 13632.3150271698. The cubic root of 185840013 is about 570.6630357694.

Adding to 185840013 its reverse (310048581), we get a palindrome (495888594).

The spelling of 185840013 in words is "one hundred eighty-five million, eight hundred forty thousand, thirteen".