19403020453 has 2 divisors, whose sum is σ = 19403020454. Its totient is φ = 19403020452.

The previous prime is 19403020451. The next prime is 19403020471. The reversal of 19403020453 is 35402030491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15826143204 + 3576877249 = 125802^2 + 59807^2 .

It is a cyclic number.

It is not a de Polignac number, because 19403020453 - 2¹ = 19403020451 is a prime.

Together with 19403020451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19403020451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9701510226 + 9701510227.

It is an arithmetic number, because the mean of its divisors is an integer number (9701510227).

Almost surely, 2^19403020453 is an apocalyptic number.

It is an amenable number.

19403020453 is a deficient number, since it is larger than the sum of its proper divisors (1).

19403020453 is an equidigital number, since it uses as much as digits as its factorization.

19403020453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 19403020453 in words is "nineteen billion, four hundred three million, twenty thousand, four hundred fifty-three".