19638010453 has 2 divisors, whose sum is σ = 19638010454. Its totient is φ = 19638010452.

The previous prime is 19638010391. The next prime is 19638010471. The reversal of 19638010453 is 35401083691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13922348049 + 5715662404 = 117993^2 + 75602^2 .

It is a cyclic number.

It is not a de Polignac number, because 19638010453 - 2³³ = 11048075861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19638010753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9819005226 + 9819005227.

It is an arithmetic number, because the mean of its divisors is an integer number (9819005227).

Almost surely, 2^19638010453 is an apocalyptic number.

It is an amenable number.

19638010453 is a deficient number, since it is larger than the sum of its proper divisors (1).

19638010453 is an equidigital number, since it uses as much as digits as its factorization.

19638010453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 19638010453 in words is "nineteen billion, six hundred thirty-eight million, ten thousand, four hundred fifty-three".