19851906341 has 2 divisors, whose sum is σ = 19851906342. Its totient is φ = 19851906340.

The previous prime is 19851906323. The next prime is 19851906343. The reversal of 19851906341 is 14360915891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17521816900 + 2330089441 = 132370^2 + 48271^2 .

It is a cyclic number.

It is not a de Polignac number, because 19851906341 - 2¹⁰ = 19851905317 is a prime.

Together with 19851906343, 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 (19851906343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9925953170 + 9925953171.

It is an arithmetic number, because the mean of its divisors is an integer number (9925953171).

Almost surely, 2^19851906341 is an apocalyptic number.

It is an amenable number.

19851906341 is a deficient number, since it is larger than the sum of its proper divisors (1).

19851906341 is an equidigital number, since it uses as much as digits as its factorization.

19851906341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 19851906341 in words is "nineteen billion, eight hundred fifty-one million, nine hundred six thousand, three hundred forty-one".