19057205209 has 16 divisors (see below), whose sum is σ = 21893832576. Its totient is φ = 16249334400.

The previous prime is 19057205191. The next prime is 19057205213. The reversal of 19057205209 is 90250275091.

It is a cyclic number.

It is not a de Polignac number, because 19057205209 - 2¹¹ = 19057203161 is a prime.

It is a super-3 number, since 3×19057205209³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (19057205239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111119 + ... + 1128139.

It is an arithmetic number, because the mean of its divisors is an integer number (1368364536).

Almost surely, 2^19057205209 is an apocalyptic number.

It is an amenable number.

19057205209 is a deficient number, since it is larger than the sum of its proper divisors (2836627367).

19057205209 is a wasteful number, since it uses less digits than its factorization.

19057205209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17856.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 19057205209 in words is "nineteen billion, fifty-seven million, two hundred five thousand, two hundred nine".