19836425781249 has 128 divisors (see below), whose sum is σ = 34279697940480. Its totient is φ = 9906048921600.

The previous prime is 19836425781197. The next prime is 19836425781257. The reversal of 19836425781249 is 94218752463891.

It is a trimorphic number since its cube, 7805311952323520090430975019836425781249, ends in 19836425781249.

It is not a de Polignac number, because 19836425781249 - 2¹¹ = 19836425779201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19836425781269) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 165476764 + ... + 165596594.

It is an arithmetic number, because the mean of its divisors is an integer number (267810140160).

Almost surely, 2^{19836425781249} is an apocalyptic number.

It is an amenable number.

19836425781249 is a deficient number, since it is larger than the sum of its proper divisors (14443272159231).

19836425781249 is a wasteful number, since it uses less digits than its factorization.

19836425781249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120171.

The product of its digits is 209018880, while the sum is 69.

The spelling of 19836425781249 in words is "nineteen trillion, eight hundred thirty-six billion, four hundred twenty-five million, seven hundred eighty-one thousand, two hundred forty-nine".