16930605421 has 2 divisors, whose sum is σ = 16930605422. Its totient is φ = 16930605420.

The previous prime is 16930605413. The next prime is 16930605427. The reversal of 16930605421 is 12450603961.

16930605421 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., 16172208900 + 758396521 = 127170^2 + 27539^2 .

It is a cyclic number.

It is not a de Polignac number, because 16930605421 - 2³ = 16930605413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16930605427) 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, 8465302710 + 8465302711.

It is an arithmetic number, because the mean of its divisors is an integer number (8465302711).

Almost surely, 2^16930605421 is an apocalyptic number.

It is an amenable number.

16930605421 is a deficient number, since it is larger than the sum of its proper divisors (1).

16930605421 is an equidigital number, since it uses as much as digits as its factorization.

16930605421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 16930605421 in words is "sixteen billion, nine hundred thirty million, six hundred five thousand, four hundred twenty-one".