19742046133 has 2 divisors, whose sum is σ = 19742046134. Its totient is φ = 19742046132.

The previous prime is 19742046031. The next prime is 19742046143. The reversal of 19742046133 is 33164024791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19606160484 + 135885649 = 140022^2 + 11657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19742046133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19742046143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9871023066 + 9871023067.

It is an arithmetic number, because the mean of its divisors is an integer number (9871023067).

Almost surely, 2^19742046133 is an apocalyptic number.

It is an amenable number.

19742046133 is a deficient number, since it is larger than the sum of its proper divisors (1).

19742046133 is an equidigital number, since it uses as much as digits as its factorization.

19742046133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 19742046133 in words is "nineteen billion, seven hundred forty-two million, forty-six thousand, one hundred thirty-three".