16730421391 has 2 divisors, whose sum is σ = 16730421392. Its totient is φ = 16730421390.

The previous prime is 16730421377. The next prime is 16730421457. The reversal of 16730421391 is 19312403761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16730421391 - 2⁷ = 16730421263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16730421391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16730421371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8365210695 + 8365210696.

It is an arithmetic number, because the mean of its divisors is an integer number (8365210696).

Almost surely, 2^16730421391 is an apocalyptic number.

16730421391 is a deficient number, since it is larger than the sum of its proper divisors (1).

16730421391 is an equidigital number, since it uses as much as digits as its factorization.

16730421391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 16730421391 in words is "sixteen billion, seven hundred thirty million, four hundred twenty-one thousand, three hundred ninety-one".