19129384909221 has 16 divisors (see below), whose sum is σ = 25767855078720. Its totient is φ = 12622237367040.

The previous prime is 19129384909171. The next prime is 19129384909237. The reversal of 19129384909221 is 12290948392191.

It is not a de Polignac number, because 19129384909221 - 2²¹ = 19129382812069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19129384909291) 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, 39554335 + ... + 40035036.

It is an arithmetic number, because the mean of its divisors is an integer number (1610490942420).

Almost surely, 2^{19129384909221} is an apocalyptic number.

It is an amenable number.

19129384909221 is a deficient number, since it is larger than the sum of its proper divisors (6638470169499).

19129384909221 is a wasteful number, since it uses less digits than its factorization.

19129384909221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79590196.

The product of its (nonzero) digits is 5038848, while the sum is 60.

The spelling of 19129384909221 in words is "nineteen trillion, one hundred twenty-nine billion, three hundred eighty-four million, nine hundred nine thousand, two hundred twenty-one".