16720100687 has 2 divisors, whose sum is σ = 16720100688. Its totient is φ = 16720100686.

The previous prime is 16720100629. The next prime is 16720100689. The reversal of 16720100687 is 78600102761.

It is a strong prime.

It is an emirp because it is prime and its reverse (78600102761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16720100687 - 2⁶ = 16720100623 is a prime.

Together with 16720100689, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16720100687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16720100689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360050343 + 8360050344.

It is an arithmetic number, because the mean of its divisors is an integer number (8360050344).

Almost surely, 2^16720100687 is an apocalyptic number.

16720100687 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720100687 is an equidigital number, since it uses as much as digits as its factorization.

16720100687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 16720100687 in words is "sixteen billion, seven hundred twenty million, one hundred thousand, six hundred eighty-seven".