19629825793 has 2 divisors, whose sum is σ = 19629825794. Its totient is φ = 19629825792.

The previous prime is 19629825781. The next prime is 19629825827. The reversal of 19629825793 is 39752892691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13211893249 + 6417932544 = 114943^2 + 80112^2 .

It is an emirp because it is prime and its reverse (39752892691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19629825793 is a prime.

It is not a weakly prime, because it can be changed into another prime (19629823793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9814912896 + 9814912897.

It is an arithmetic number, because the mean of its divisors is an integer number (9814912897).

Almost surely, 2^19629825793 is an apocalyptic number.

It is an amenable number.

19629825793 is a deficient number, since it is larger than the sum of its proper divisors (1).

19629825793 is an equidigital number, since it uses as much as digits as its factorization.

19629825793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 61.

The spelling of 19629825793 in words is "nineteen billion, six hundred twenty-nine million, eight hundred twenty-five thousand, seven hundred ninety-three".