19581334192794 has 16 divisors (see below), whose sum is σ = 42722910966240. Its totient is φ = 5933737634160.

The previous prime is 19581334192423. The next prime is 19581334193189. The reversal of 19581334192794 is 49729143318591.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 296686881709 = 19581334192794 / (1 + 9 + 5 + 8 + 1 + 3 + 3 + 4 + 1 + 9 + 2 + 7 + 9 + 4).

It is a lonely number, since its distance to closest prime (19581334192423) sets a new record.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148343440789 + ... + 148343440920.

It is an arithmetic number, because the mean of its divisors is an integer number (2670181935390).

Almost surely, 2^{19581334192794} is an apocalyptic number.

19581334192794 is an abundant number, since it is smaller than the sum of its proper divisors (23141576773446).

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

19581334192794 is a wasteful number, since it uses less digits than its factorization.

19581334192794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296686881725.

The product of its digits is 58786560, while the sum is 66.

The spelling of 19581334192794 in words is "nineteen trillion, five hundred eighty-one billion, three hundred thirty-four million, one hundred ninety-two thousand, seven hundred ninety-four".