19713092381 has 2 divisors, whose sum is σ = 19713092382. Its totient is φ = 19713092380.

The previous prime is 19713092369. The next prime is 19713092383. The reversal of 19713092381 is 18329031791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18412047481 + 1301044900 = 135691^2 + 36070^2 .

It is a cyclic number.

It is not a de Polignac number, because 19713092381 - 2¹⁴ = 19713075997 is a prime.

It is a super-2 number, since 2×19713092381² (a number of 21 digits) contains 22 as substring.

Together with 19713092383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19713092383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9856546190 + 9856546191.

It is an arithmetic number, because the mean of its divisors is an integer number (9856546191).

Almost surely, 2^19713092381 is an apocalyptic number.

It is an amenable number.

19713092381 is a deficient number, since it is larger than the sum of its proper divisors (1).

19713092381 is an equidigital number, since it uses as much as digits as its factorization.

19713092381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 19713092381 in words is "nineteen billion, seven hundred thirteen million, ninety-two thousand, three hundred eighty-one".