19904281779441 has 16 divisors (see below), whose sum is σ = 28185057286848. Its totient is φ = 12451230105600.

The previous prime is 19904281779439. The next prime is 19904281779457. The reversal of 19904281779441 is 14497718240991.

It is not a de Polignac number, because 19904281779441 - 2¹ = 19904281779439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19904281779541) 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, 589530000 + ... + 589563761.

It is an arithmetic number, because the mean of its divisors is an integer number (1761566080428).

Almost surely, 2^{19904281779441} is an apocalyptic number.

It is an amenable number.

19904281779441 is a deficient number, since it is larger than the sum of its proper divisors (8280775507407).

19904281779441 is a wasteful number, since it uses less digits than its factorization.

19904281779441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179094112.

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 19904281779441 in words is "nineteen trillion, nine hundred four billion, two hundred eighty-one million, seven hundred seventy-nine thousand, four hundred forty-one".