19110919201 has 6 divisors (see below), whose sum is σ = 21006217106. Its totient is φ = 17373562800.

The previous prime is 19110919199. The next prime is 19110919249. The reversal of 19110919201 is 10291901191.

It can be written as a sum of positive squares in only one way, i.e., 17016941601 + 2093977600 = 130449^2 + 45760^2 .

It is not a de Polignac number, because 19110919201 - 2¹ = 19110919199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19110949201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78970620 + ... + 78970861.

Almost surely, 2^19110919201 is an apocalyptic number.

19110919201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19110919201 is a deficient number, since it is larger than the sum of its proper divisors (1895297905).

19110919201 is a wasteful number, since it uses less digits than its factorization.

19110919201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157941503 (or 157941492 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 19110919201 in words is "nineteen billion, one hundred ten million, nine hundred nineteen thousand, two hundred one".