16976911993 has 4 divisors (see below), whose sum is σ = 17040023460. Its totient is φ = 16913800528.

The previous prime is 16976911981. The next prime is 16976912033. The reversal of 16976911993 is 39911967961.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6539633424 + 10437278569 = 80868^2 + 102163^2 .

It is a cyclic number.

It is not a de Polignac number, because 16976911993 - 2⁹ = 16976911481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16976911933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31555330 + ... + 31555867.

It is an arithmetic number, because the mean of its divisors is an integer number (4260005865).

Almost surely, 2^16976911993 is an apocalyptic number.

It is an amenable number.

16976911993 is a deficient number, since it is larger than the sum of its proper divisors (63111467).

16976911993 is an equidigital number, since it uses as much as digits as its factorization.

16976911993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63111466.

The product of its digits is 4960116, while the sum is 61.

The spelling of 16976911993 in words is "sixteen billion, nine hundred seventy-six million, nine hundred eleven thousand, nine hundred ninety-three".