19018371953 has 16 divisors (see below), whose sum is σ = 21797216640. Its totient is φ = 16255075200.

The previous prime is 19018371949. The next prime is 19018371973. The reversal of 19018371953 is 35917381091.

It is not a de Polignac number, because 19018371953 - 2² = 19018371949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19018371898 and 19018371907.

It is not an unprimeable number, because it can be changed into a prime (19018371973) 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, 5902883 + ... + 5906103.

It is an arithmetic number, because the mean of its divisors is an integer number (1362326040).

Almost surely, 2^19018371953 is an apocalyptic number.

It is an amenable number.

19018371953 is a deficient number, since it is larger than the sum of its proper divisors (2778844687).

19018371953 is a wasteful number, since it uses less digits than its factorization.

19018371953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368.

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 19018371953 in words is "nineteen billion, eighteen million, three hundred seventy-one thousand, nine hundred fifty-three".