208712018343813 has 32 divisors (see below), whose sum is σ = 293234190681600. Its totient is φ = 131680881135936.

The previous prime is 208712018343809. The next prime is 208712018343839. The reversal of 208712018343813 is 318343810217802.

It is not a de Polignac number, because 208712018343813 - 2² = 208712018343809 is a prime.

It is a super-2 number, since 2×208712018343813² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208712018343113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460153606 + ... + 460606952.

It is an arithmetic number, because the mean of its divisors is an integer number (9163568458800).

Almost surely, 2^{208712018343813} is an apocalyptic number.

It is an amenable number.

208712018343813 is a deficient number, since it is larger than the sum of its proper divisors (84522172337787).

208712018343813 is a wasteful number, since it uses less digits than its factorization.

208712018343813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461761.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 208712018343813 in words is "two hundred eight trillion, seven hundred twelve billion, eighteen million, three hundred forty-three thousand, eight hundred thirteen".