19019684149 has 2 divisors, whose sum is σ = 19019684150. Its totient is φ = 19019684148.

The previous prime is 19019684141. The next prime is 19019684153. The reversal of 19019684149 is 94148691091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12931783524 + 6087900625 = 113718^2 + 78025^2 .

It is a cyclic number.

It is not a de Polignac number, because 19019684149 - 2³ = 19019684141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19019684096 and 19019684105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19019684141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9509842074 + 9509842075.

It is an arithmetic number, because the mean of its divisors is an integer number (9509842075).

Almost surely, 2^19019684149 is an apocalyptic number.

It is an amenable number.

19019684149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19019684149 is an equidigital number, since it uses as much as digits as its factorization.

19019684149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 19019684149 in words is "nineteen billion, nineteen million, six hundred eighty-four thousand, one hundred forty-nine".