19045905471838 has 16 divisors (see below), whose sum is σ = 32650840568160. Its totient is φ = 8162351690976.

The previous prime is 19045905471829. The next prime is 19045905471863. The reversal of 19045905471838 is 83817450954091.

It is a super-2 number, since 2×19045905471838² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19045905471838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14274073 + ... + 15551236.

It is an arithmetic number, because the mean of its divisors is an integer number (2040677535510).

Almost surely, 2^{19045905471838} is an apocalyptic number.

19045905471838 is a deficient number, since it is larger than the sum of its proper divisors (13604935096322).

19045905471838 is a wasteful number, since it uses less digits than its factorization.

19045905471838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29870931.

The product of its (nonzero) digits is 43545600, while the sum is 64.

The spelling of 19045905471838 in words is "nineteen trillion, forty-five billion, nine hundred five million, four hundred seventy-one thousand, eight hundred thirty-eight".