16380021173 has 2 divisors, whose sum is σ = 16380021174. Its totient is φ = 16380021172.

The previous prime is 16380021121. The next prime is 16380021179. The reversal of 16380021173 is 37112008361.

16380021173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16379392324 + 628849 = 127982^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 16380021173 - 2³⁰ = 15306279349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16380021179) 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 as a sum of consecutive naturals, namely, 8190010586 + 8190010587.

It is an arithmetic number, because the mean of its divisors is an integer number (8190010587).

Almost surely, 2^16380021173 is an apocalyptic number.

It is an amenable number.

16380021173 is a deficient number, since it is larger than the sum of its proper divisors (1).

16380021173 is an equidigital number, since it uses as much as digits as its factorization.

16380021173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 16380021173 in words is "sixteen billion, three hundred eighty million, twenty-one thousand, one hundred seventy-three".