19394699801 has 2 divisors, whose sum is σ = 19394699802. Its totient is φ = 19394699800.

The previous prime is 19394699773. The next prime is 19394699803. The reversal of 19394699801 is 10899649391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19314328576 + 80371225 = 138976^2 + 8965^2 .

It is a cyclic number.

It is not a de Polignac number, because 19394699801 - 2¹⁰ = 19394698777 is a prime.

Together with 19394699803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19394699803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9697349900 + 9697349901.

It is an arithmetic number, because the mean of its divisors is an integer number (9697349901).

Almost surely, 2^19394699801 is an apocalyptic number.

It is an amenable number.

19394699801 is a deficient number, since it is larger than the sum of its proper divisors (1).

19394699801 is an equidigital number, since it uses as much as digits as its factorization.

19394699801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 59.

The spelling of 19394699801 in words is "nineteen billion, three hundred ninety-four million, six hundred ninety-nine thousand, eight hundred one".