19630550897 has 2 divisors, whose sum is σ = 19630550898. Its totient is φ = 19630550896.

The previous prime is 19630550893. The next prime is 19630550923. The reversal of 19630550897 is 79805503691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19002346801 + 628204096 = 137849^2 + 25064^2 .

It is a cyclic number.

It is not a de Polignac number, because 19630550897 - 2² = 19630550893 is a prime.

It is not a weakly prime, because it can be changed into another prime (19630550893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9815275448 + 9815275449.

It is an arithmetic number, because the mean of its divisors is an integer number (9815275449).

Almost surely, 2^19630550897 is an apocalyptic number.

It is an amenable number.

19630550897 is a deficient number, since it is larger than the sum of its proper divisors (1).

19630550897 is an equidigital number, since it uses as much as digits as its factorization.

19630550897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The spelling of 19630550897 in words is "nineteen billion, six hundred thirty million, five hundred fifty thousand, eight hundred ninety-seven".