11828837821 has 2 divisors, whose sum is σ = 11828837822. Its totient is φ = 11828837820.

The previous prime is 11828837819. The next prime is 11828837837. The reversal of 11828837821 is 12873882811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11751644025 + 77193796 = 108405^2 + 8786^2 .

It is a cyclic number.

It is not a de Polignac number, because 11828837821 - 2¹ = 11828837819 is a prime.

Together with 11828837819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11828837851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5914418910 + 5914418911.

It is an arithmetic number, because the mean of its divisors is an integer number (5914418911).

Almost surely, 2^11828837821 is an apocalyptic number.

It is an amenable number.

11828837821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11828837821 is an equidigital number, since it uses as much as digits as its factorization.

11828837821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 344064, while the sum is 49.

The spelling of 11828837821 in words is "eleven billion, eight hundred twenty-eight million, eight hundred thirty-seven thousand, eight hundred twenty-one".