19750449113 has 2 divisors, whose sum is σ = 19750449114. Its totient is φ = 19750449112.

The previous prime is 19750449109. The next prime is 19750449133. The reversal of 19750449113 is 31194405791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14263047184 + 5487401929 = 119428^2 + 74077^2 .

It is a cyclic number.

It is not a de Polignac number, because 19750449113 - 2² = 19750449109 is a prime.

It is not a weakly prime, because it can be changed into another prime (19750449133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9875224556 + 9875224557.

It is an arithmetic number, because the mean of its divisors is an integer number (9875224557).

Almost surely, 2^19750449113 is an apocalyptic number.

It is an amenable number.

19750449113 is a deficient number, since it is larger than the sum of its proper divisors (1).

19750449113 is an equidigital number, since it uses as much as digits as its factorization.

19750449113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 19750449113 in words is "nineteen billion, seven hundred fifty million, four hundred forty-nine thousand, one hundred thirteen".