16381307213 has 2 divisors, whose sum is σ = 16381307214. Its totient is φ = 16381307212.

The previous prime is 16381307183. The next prime is 16381307251. The reversal of 16381307213 is 31270318361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16162799689 + 218507524 = 127133^2 + 14782^2 .

It is a cyclic number.

It is not a de Polignac number, because 16381307213 - 2¹⁰ = 16381306189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16381307713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8190653606 + 8190653607.

It is an arithmetic number, because the mean of its divisors is an integer number (8190653607).

Almost surely, 2^16381307213 is an apocalyptic number.

It is an amenable number.

16381307213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16381307213 is an equidigital number, since it uses as much as digits as its factorization.

16381307213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 16381307213 in words is "sixteen billion, three hundred eighty-one million, three hundred seven thousand, two hundred thirteen".