19838861537353 has 8 divisors (see below), whose sum is σ = 19918413232200. Its totient is φ = 19759352815488.

The previous prime is 19838861537309. The next prime is 19838861537359. The reversal of 19838861537353 is 35373516883891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 744653362489 + 19094208174864 = 862933^2 + 4369692^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19838861537353 - 2⁹ = 19838861536841 is a prime.

It is a super-2 number, since 2×19838861537353² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19838861537359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9817918 + ... + 11664871.

It is an arithmetic number, because the mean of its divisors is an integer number (2489801654025).

Almost surely, 2^{19838861537353} is an apocalyptic number.

It is an amenable number.

19838861537353 is a deficient number, since it is larger than the sum of its proper divisors (79551694847).

19838861537353 is a wasteful number, since it uses less digits than its factorization.

19838861537353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21486491.

The product of its digits is 391910400, while the sum is 70.

The spelling of 19838861537353 in words is "nineteen trillion, eight hundred thirty-eight billion, eight hundred sixty-one million, five hundred thirty-seven thousand, three hundred fifty-three".