194431314019 has 2 divisors, whose sum is σ = 194431314020.
Its totient is φ = 194431314018.
The previous prime is 194431314017. The next prime is 194431314061. The reversal of 194431314019 is 910413134491.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 194431314019 - 21 = 194431314017 is a prime.
It is a super-2 number, since 2×1944313140192 (a number of 23 digits) contains 22 as substring.
Together with 194431314017, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (194431314013) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97215657009 + 97215657010.
It is an arithmetic number, because the mean of its divisors is an integer number (97215657010).
Almost surely, 2194431314019 is an apocalyptic number.
194431314019 is a deficient number, since it is larger than the sum of its proper divisors (1).
194431314019 is an equidigital number, since it uses as much as digits as its factorization.
194431314019 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 46656, while the sum is 40.
The spelling of 194431314019 in words is "one hundred ninety-four billion, four hundred thirty-one million, three hundred fourteen thousand, nineteen".