19729719289428 has 24 divisors (see below), whose sum is σ = 46091543678880. Its totient is φ = 6568639953120.

The previous prime is 19729719289421. The next prime is 19729719289447. The reversal of 19729719289428 is 82498291792791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19729719289421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991632558 + ... + 991652453.

It is an arithmetic number, because the mean of its divisors is an integer number (1920480986620).

Almost surely, 2^{19729719289428} is an apocalyptic number.

It is an amenable number.

19729719289428 is an abundant number, since it is smaller than the sum of its proper divisors (26361824389452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19729719289428 is a wasteful number, since it uses less digits than its factorization.

19729719289428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983285847 (or 1983285845 counting only the distinct ones).

The product of its digits is 658409472, while the sum is 78.

The spelling of 19729719289428 in words is "nineteen trillion, seven hundred twenty-nine billion, seven hundred nineteen million, two hundred eighty-nine thousand, four hundred twenty-eight".