19754133109 has 2 divisors, whose sum is σ = 19754133110. Its totient is φ = 19754133108.

The previous prime is 19754133103. The next prime is 19754133121. The reversal of 19754133109 is 90133145791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19746432484 + 7700625 = 140522^2 + 2775^2 .

It is a cyclic number.

It is not a de Polignac number, because 19754133109 - 2⁹ = 19754132597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19754133103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9877066554 + 9877066555.

It is an arithmetic number, because the mean of its divisors is an integer number (9877066555).

Almost surely, 2^19754133109 is an apocalyptic number.

It is an amenable number.

19754133109 is a deficient number, since it is larger than the sum of its proper divisors (1).

19754133109 is an equidigital number, since it uses as much as digits as its factorization.

19754133109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 43.

The spelling of 19754133109 in words is "nineteen billion, seven hundred fifty-four million, one hundred thirty-three thousand, one hundred nine".