19551106193 has 2 divisors, whose sum is σ = 19551106194. Its totient is φ = 19551106192.

The previous prime is 19551106109. The next prime is 19551106213. The reversal of 19551106193 is 39160115591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15166415104 + 4384691089 = 123152^2 + 66217^2 .

It is a cyclic number.

It is not a de Polignac number, because 19551106193 - 2¹² = 19551102097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19551106193.

It is not a weakly prime, because it can be changed into another prime (19551106493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9775553096 + 9775553097.

It is an arithmetic number, because the mean of its divisors is an integer number (9775553097).

Almost surely, 2^19551106193 is an apocalyptic number.

It is an amenable number.

19551106193 is a deficient number, since it is larger than the sum of its proper divisors (1).

19551106193 is an equidigital number, since it uses as much as digits as its factorization.

19551106193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 41.

The spelling of 19551106193 in words is "nineteen billion, five hundred fifty-one million, one hundred six thousand, one hundred ninety-three".