19642491053 has 2 divisors, whose sum is σ = 19642491054. Its totient is φ = 19642491052.

The previous prime is 19642491041. The next prime is 19642491059. The reversal of 19642491053 is 35019424691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13366365769 + 6276125284 = 115613^2 + 79222^2 .

It is a cyclic number.

It is not a de Polignac number, because 19642491053 - 2¹⁰ = 19642490029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19642490995 and 19642491013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19642491059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9821245526 + 9821245527.

It is an arithmetic number, because the mean of its divisors is an integer number (9821245527).

Almost surely, 2^19642491053 is an apocalyptic number.

It is an amenable number.

19642491053 is a deficient number, since it is larger than the sum of its proper divisors (1).

19642491053 is an equidigital number, since it uses as much as digits as its factorization.

19642491053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 19642491053 in words is "nineteen billion, six hundred forty-two million, four hundred ninety-one thousand, fifty-three".