218355203847 has 16 divisors (see below), whose sum is σ = 324365179392. Its totient is φ = 129520816320.

The previous prime is 218355203837. The next prime is 218355203851. The reversal of 218355203847 is 748302553812.

It is not a de Polignac number, because 218355203847 - 2¹⁰ = 218355202823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 218355203796 and 218355203805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218355203837) 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, 70390198 + ... + 70393299.

It is an arithmetic number, because the mean of its divisors is an integer number (20272823712).

Almost surely, 2^218355203847 is an apocalyptic number.

218355203847 is a deficient number, since it is larger than the sum of its proper divisors (106009975545).

218355203847 is a wasteful number, since it uses less digits than its factorization.

218355203847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140783558.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 218355203847 in words is "two hundred eighteen billion, three hundred fifty-five million, two hundred three thousand, eight hundred forty-seven".