213820380827 has 4 divisors (see below), whose sum is σ = 213825070200. Its totient is φ = 213815691456.

The previous prime is 213820380797. The next prime is 213820380841. The reversal of 213820380827 is 728083028312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213820380827 - 2²⁸ = 213551945371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213820383827) 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 3 ways as a sum of consecutive naturals, for example, 2275613 + ... + 2367710.

It is an arithmetic number, because the mean of its divisors is an integer number (53456267550).

Almost surely, 2^213820380827 is an apocalyptic number.

213820380827 is a deficient number, since it is larger than the sum of its proper divisors (4689373).

213820380827 is an equidigital number, since it uses as much as digits as its factorization.

213820380827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4689372.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 213820380827 in words is "two hundred thirteen billion, eight hundred twenty million, three hundred eighty thousand, eight hundred twenty-seven".