16743566021 has 24 divisors (see below), whose sum is σ = 21044026080. Its totient is φ = 13204350432.

The previous prime is 16743566017. The next prime is 16743566027. The reversal of 16743566021 is 12066534761.

It is not a de Polignac number, because 16743566021 - 2² = 16743566017 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16743566021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16743566027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152750 + ... + 238368.

It is an arithmetic number, because the mean of its divisors is an integer number (876834420).

Almost surely, 2^16743566021 is an apocalyptic number.

It is an amenable number.

16743566021 is a deficient number, since it is larger than the sum of its proper divisors (4300460059).

16743566021 is a wasteful number, since it uses less digits than its factorization.

16743566021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85953 (or 85946 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 16743566021 in words is "sixteen billion, seven hundred forty-three million, five hundred sixty-six thousand, twenty-one".