21047844461186 has 8 divisors (see below), whose sum is σ = 31812772544784. Its totient is φ = 10443586946260.

The previous prime is 21047844461167. The next prime is 21047844461233. The reversal of 21047844461186 is 68116444874012.

It is a happy number.

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 40167641840 + ... + 40167642363.

It is an arithmetic number, because the mean of its divisors is an integer number (3976596568098).

Almost surely, 2^{21047844461186} is an apocalyptic number.

21047844461186 is a deficient number, since it is larger than the sum of its proper divisors (10764928083598).

21047844461186 is a wasteful number, since it uses less digits than its factorization.

21047844461186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80335284336.

The product of its (nonzero) digits is 8257536, while the sum is 56.

The spelling of 21047844461186 in words is "twenty-one trillion, forty-seven billion, eight hundred forty-four million, four hundred sixty-one thousand, one hundred eighty-six".