13820827181 has 4 divisors (see below), whose sum is σ = 15795231072. Its totient is φ = 11846423292.

The previous prime is 13820827159. The next prime is 13820827199. The reversal of 13820827181 is 18172802831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13820827181 - 2⁶ = 13820827117 is a prime.

It is a super-2 number, since 2×13820827181² (a number of 21 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 (13820827081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987201935 + ... + 987201948.

It is an arithmetic number, because the mean of its divisors is an integer number (3948807768).

Almost surely, 2^13820827181 is an apocalyptic number.

It is an amenable number.

13820827181 is a deficient number, since it is larger than the sum of its proper divisors (1974403891).

13820827181 is an equidigital number, since it uses as much as digits as its factorization.

13820827181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974403890.

The product of its (nonzero) digits is 43008, while the sum is 41.

The spelling of 13820827181 in words is "thirteen billion, eight hundred twenty million, eight hundred twenty-seven thousand, one hundred eighty-one".