2019819401 has 2 divisors, whose sum is σ = 2019819402. Its totient is φ = 2019819400.

The previous prime is 2019819383. The next prime is 2019819421. The reversal of 2019819401 is 1049189102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1760641600 + 259177801 = 41960^2 + 16099^2 .

It is a cyclic number.

It is not a de Polignac number, because 2019819401 - 2¹⁸ = 2019557257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2019819421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009909700 + 1009909701.

It is an arithmetic number, because the mean of its divisors is an integer number (1009909701).

Almost surely, 2^2019819401 is an apocalyptic number.

It is an amenable number.

2019819401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019819401 is an equidigital number, since it uses as much as digits as its factorization.

2019819401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 2019819401 is about 44942.4009260743. The cubic root of 2019819401 is about 1264.0691910613.

The spelling of 2019819401 in words is "two billion, nineteen million, eight hundred nineteen thousand, four hundred one".