16700203701989 has 2 divisors, whose sum is σ = 16700203701990. Its totient is φ = 16700203701988.

The previous prime is 16700203701977. The next prime is 16700203702019. The reversal of 16700203701989 is 98910730200761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14051177280100 + 2649026421889 = 3748490^2 + 1627583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16700203701989 is a prime.

It is a super-2 number, since 2×16700203701989² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16700203701989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16700203701589) 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 as a sum of consecutive naturals, namely, 8350101850994 + 8350101850995.

It is an arithmetic number, because the mean of its divisors is an integer number (8350101850995).

Almost surely, 2^{16700203701989} is an apocalyptic number.

It is an amenable number.

16700203701989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16700203701989 is an equidigital number, since it uses as much as digits as its factorization.

16700203701989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 16700203701989 in words is "sixteen trillion, seven hundred billion, two hundred three million, seven hundred one thousand, nine hundred eighty-nine".