19986258361213 has 8 divisors (see below), whose sum is σ = 19993222323800. Its totient is φ = 19979295098688.

The previous prime is 19986258361169. The next prime is 19986258361261. The reversal of 19986258361213 is 31216385268991.

It can be written as a sum of positive squares in 4 ways, for example, as 251580490084 + 19734677871129 = 501578^2 + 4442373^2 .

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 19986258361213 - 2¹³ = 19986258353021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19986258361613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60574195 + ... + 60903247.

It is an arithmetic number, because the mean of its divisors is an integer number (2499152790475).

Almost surely, 2^{19986258361213} is an apocalyptic number.

It is an amenable number.

19986258361213 is a deficient number, since it is larger than the sum of its proper divisors (6963962587).

19986258361213 is a wasteful number, since it uses less digits than its factorization.

19986258361213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350031.

The product of its digits is 33592320, while the sum is 64.

The spelling of 19986258361213 in words is "nineteen trillion, nine hundred eighty-six billion, two hundred fifty-eight million, three hundred sixty-one thousand, two hundred thirteen".