19729279684222 has 8 divisors (see below), whose sum is σ = 29647050442776. Its totient is φ = 9846929536632.

The previous prime is 19729279684201. The next prime is 19729279684223. The reversal of 19729279684222 is 22248697292791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19729279684223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8855151348 + ... + 8855153575.

It is an arithmetic number, because the mean of its divisors is an integer number (3705881305347).

Almost surely, 2^{19729279684222} is an apocalyptic number.

19729279684222 is a deficient number, since it is larger than the sum of its proper divisors (9917770758554).

19729279684222 is a wasteful number, since it uses less digits than its factorization.

19729279684222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17710305482.

The product of its digits is 219469824, while the sum is 70.

The spelling of 19729279684222 in words is "nineteen trillion, seven hundred twenty-nine billion, two hundred seventy-nine million, six hundred eighty-four thousand, two hundred twenty-two".