186442540213 has 8 divisors (see below), whose sum is σ = 187650747200. Its totient is φ = 185237046720.

The previous prime is 186442540157. The next prime is 186442540231. The reversal of 186442540213 is 312045244681.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 186442540213 - 2²¹ = 186440443061 is a prime.

It is a super-2 number, since 2×186442540213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186442540243) 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, 540420 + ... + 815437.

It is an arithmetic number, because the mean of its divisors is an integer number (23456343400).

Almost surely, 2^186442540213 is an apocalyptic number.

It is an amenable number.

186442540213 is a deficient number, since it is larger than the sum of its proper divisors (1208206987).

186442540213 is a wasteful number, since it uses less digits than its factorization.

186442540213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356747.

The product of its (nonzero) digits is 184320, while the sum is 40.

Adding to 186442540213 its reverse (312045244681), we get a palindrome (498487784894).

The spelling of 186442540213 in words is "one hundred eighty-six billion, four hundred forty-two million, five hundred forty thousand, two hundred thirteen".