19729454741 has 2 divisors, whose sum is σ = 19729454742. Its totient is φ = 19729454740.

The previous prime is 19729454687. The next prime is 19729454807. The reversal of 19729454741 is 14745492791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14005775716 + 5723679025 = 118346^2 + 75655^2 .

It is a cyclic number.

It is not a de Polignac number, because 19729454741 - 2⁶ = 19729454677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19729451741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9864727370 + 9864727371.

It is an arithmetic number, because the mean of its divisors is an integer number (9864727371).

Almost surely, 2^19729454741 is an apocalyptic number.

It is an amenable number.

19729454741 is a deficient number, since it is larger than the sum of its proper divisors (1).

19729454741 is an equidigital number, since it uses as much as digits as its factorization.

19729454741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The spelling of 19729454741 in words is "nineteen billion, seven hundred twenty-nine million, four hundred fifty-four thousand, seven hundred forty-one".