21736149166 has 16 divisors (see below), whose sum is σ = 33687288288. Its totient is φ = 10512829600.

The previous prime is 21736149161. The next prime is 21736149199. The reversal of 21736149166 is 66194163712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21736149161) 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, 1436545 + ... + 1451596.

It is an arithmetic number, because the mean of its divisors is an integer number (2105455518).

Almost surely, 2^21736149166 is an apocalyptic number.

21736149166 is a deficient number, since it is larger than the sum of its proper divisors (11951139122).

21736149166 is a wasteful number, since it uses less digits than its factorization.

21736149166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888267.

The product of its digits is 326592, while the sum is 46.

The spelling of 21736149166 in words is "twenty-one billion, seven hundred thirty-six million, one hundred forty-nine thousand, one hundred sixty-six".