19428811794 has 96 divisors (see below), whose sum is σ = 52826207616. Its totient is φ = 5224538880.

The previous prime is 19428811793. The next prime is 19428811849. The reversal of 19428811794 is 49711882491.

19428811794 is a `hidden beast` number, since 19 + 428 + 8 + 117 + 94 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19428811794.

It is not an unprimeable number, because it can be changed into a prime (19428811793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110137 + ... + 225804.

It is an arithmetic number, because the mean of its divisors is an integer number (550272996).

Almost surely, 2^19428811794 is an apocalyptic number.

19428811794 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19428811794 is an abundant number, since it is smaller than the sum of its proper divisors (33397395822).

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

19428811794 is a wasteful number, since it uses less digits than its factorization.

19428811794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335982 (or 335970 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The spelling of 19428811794 in words is "nineteen billion, four hundred twenty-eight million, eight hundred eleven thousand, seven hundred ninety-four".