19308409213 has 2 divisors, whose sum is σ = 19308409214. Its totient is φ = 19308409212.

The previous prime is 19308409181. The next prime is 19308409217. The reversal of 19308409213 is 31290480391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13915269369 + 5393139844 = 117963^2 + 73438^2 .

It is a cyclic number.

It is not a de Polignac number, because 19308409213 - 2⁵ = 19308409181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19308409217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9654204606 + 9654204607.

It is an arithmetic number, because the mean of its divisors is an integer number (9654204607).

Almost surely, 2^19308409213 is an apocalyptic number.

It is an amenable number.

19308409213 is a deficient number, since it is larger than the sum of its proper divisors (1).

19308409213 is an equidigital number, since it uses as much as digits as its factorization.

19308409213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 19308409213 in words is "nineteen billion, three hundred eight million, four hundred nine thousand, two hundred thirteen".