16685007893 has 2 divisors, whose sum is σ = 16685007894. Its totient is φ = 16685007892.

The previous prime is 16685007869. The next prime is 16685007917. The reversal of 16685007893 is 39870058661.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (16685007869) and next prime (16685007917).

It can be written as a sum of positive squares in only one way, i.e., 15227066404 + 1457941489 = 123398^2 + 38183^2 .

It is a cyclic number.

It is not a de Polignac number, because 16685007893 - 2¹⁴ = 16684991509 is a prime.

It is a super-3 number, since 3×16685007893³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16685007193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342503946 + 8342503947.

It is an arithmetic number, because the mean of its divisors is an integer number (8342503947).

Almost surely, 2^16685007893 is an apocalyptic number.

It is an amenable number.

16685007893 is a deficient number, since it is larger than the sum of its proper divisors (1).

16685007893 is an equidigital number, since it uses as much as digits as its factorization.

16685007893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 16685007893 in words is "sixteen billion, six hundred eighty-five million, seven thousand, eight hundred ninety-three".