19040718145221 has 24 divisors (see below), whose sum is σ = 27929680925120. Its totient is φ = 12497218405056.

The previous prime is 19040718145217. The next prime is 19040718145223. The reversal of 19040718145221 is 12254181704091.

It is a happy number.

19040718145221 is a `hidden beast` number, since 1 + 9 + 0 + 40 + 7 + 1 + 81 + 4 + 522 + 1 = 666.

It is not a de Polignac number, because 19040718145221 - 2² = 19040718145217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19040718145223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7949401 + ... + 10063518.

Almost surely, 2^{19040718145221} is an apocalyptic number.

It is an amenable number.

19040718145221 is a deficient number, since it is larger than the sum of its proper divisors (8888962779899).

19040718145221 is a wasteful number, since it uses less digits than its factorization.

19040718145221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18014745 (or 18014742 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 19040718145221 in words is "nineteen trillion, forty billion, seven hundred eighteen million, one hundred forty-five thousand, two hundred twenty-one".