19967148049 has 2 divisors, whose sum is σ = 19967148050. Its totient is φ = 19967148048.

The previous prime is 19967148041. The next prime is 19967148107. The reversal of 19967148049 is 94084176991.

It is an a-pointer prime, because the next prime (19967148107) can be obtained adding 19967148049 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12968654400 + 6998493649 = 113880^2 + 83657^2 .

It is a cyclic number.

It is not a de Polignac number, because 19967148049 - 2³ = 19967148041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19967147984 and 19967148002.

It is not a weakly prime, because it can be changed into another prime (19967148041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9983574024 + 9983574025.

It is an arithmetic number, because the mean of its divisors is an integer number (9983574025).

Almost surely, 2^19967148049 is an apocalyptic number.

It is an amenable number.

19967148049 is a deficient number, since it is larger than the sum of its proper divisors (1).

19967148049 is an equidigital number, since it uses as much as digits as its factorization.

19967148049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 19967148049 in words is "nineteen billion, nine hundred sixty-seven million, one hundred forty-eight thousand, forty-nine".