201220503318 has 32 divisors (see below), whose sum is σ = 461581086720. Its totient is φ = 64909839240.

The previous prime is 201220503313. The next prime is 201220503329. The reversal of 201220503318 is 813305022102.

201220503318 is a `hidden beast` number, since 2 + 0 + 122 + 0 + 503 + 31 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201220503291 and 201220503300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220503313) 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, 60100030 + ... + 60103377.

It is an arithmetic number, because the mean of its divisors is an integer number (14424408960).

Almost surely, 2^201220503318 is an apocalyptic number.

201220503318 is an abundant number, since it is smaller than the sum of its proper divisors (260360583402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201220503318 is a wasteful number, since it uses less digits than its factorization.

201220503318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120203449 (or 120203443 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 201220503318 in words is "two hundred one billion, two hundred twenty million, five hundred three thousand, three hundred eighteen".