19204693049 has 2 divisors, whose sum is σ = 19204693050. Its totient is φ = 19204693048.

The previous prime is 19204693031. The next prime is 19204693073. The reversal of 19204693049 is 94039640291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16849338025 + 2355355024 = 129805^2 + 48532^2 .

It is an emirp because it is prime and its reverse (94039640291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19204693049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19204692994 and 19204693012.

It is not a weakly prime, because it can be changed into another prime (19204693649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9602346524 + 9602346525.

It is an arithmetic number, because the mean of its divisors is an integer number (9602346525).

Almost surely, 2^19204693049 is an apocalyptic number.

It is an amenable number.

19204693049 is a deficient number, since it is larger than the sum of its proper divisors (1).

19204693049 is an equidigital number, since it uses as much as digits as its factorization.

19204693049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 19204693049 in words is "nineteen billion, two hundred four million, six hundred ninety-three thousand, forty-nine".