19394514371 has 2 divisors, whose sum is σ = 19394514372. Its totient is φ = 19394514370.

The previous prime is 19394514361. The next prime is 19394514383. The reversal of 19394514371 is 17341549391.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19394514371 is a prime.

It is a super-2 number, since 2×19394514371² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (19394514361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9697257185 + 9697257186.

It is an arithmetic number, because the mean of its divisors is an integer number (9697257186).

Almost surely, 2^19394514371 is an apocalyptic number.

19394514371 is a deficient number, since it is larger than the sum of its proper divisors (1).

19394514371 is an equidigital number, since it uses as much as digits as its factorization.

19394514371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 47.

The spelling of 19394514371 in words is "nineteen billion, three hundred ninety-four million, five hundred fourteen thousand, three hundred seventy-one".