20368459181 has 8 divisors (see below), whose sum is σ = 23304789120. Its totient is φ = 17438766768.

The previous prime is 20368459159. The next prime is 20368459229. The reversal of 20368459181 is 18195486302.

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 a de Polignac number, because none of the positive numbers 2^k-20368459181 is a prime.

It is a super-2 number, since 2×20368459181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368459141) 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 7 ways as a sum of consecutive naturals, for example, 1652801 + ... + 1665078.

It is an arithmetic number, because the mean of its divisors is an integer number (2913098640).

Almost surely, 2^20368459181 is an apocalyptic number.

It is an amenable number.

20368459181 is a deficient number, since it is larger than the sum of its proper divisors (2936329939).

20368459181 is an equidigital number, since it uses as much as digits as its factorization.

20368459181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318763.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 20368459181 in words is "twenty billion, three hundred sixty-eight million, four hundred fifty-nine thousand, one hundred eighty-one".