217682760020 has 48 divisors (see below), whose sum is σ = 498781172736. Its totient is φ = 79143120000.

The previous prime is 217682760013. The next prime is 217682760079. The reversal of 217682760020 is 20067286712.

It is a self number, because there is not a number n which added to its sum of digits gives 217682760020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1176845 + ... + 1349195.

It is an arithmetic number, because the mean of its divisors is an integer number (10391274432).

Almost surely, 2^217682760020 is an apocalyptic number.

217682760020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217682760020 is an abundant number, since it is smaller than the sum of its proper divisors (281098412716).

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

217682760020 is a wasteful number, since it uses less digits than its factorization.

217682760020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178112 (or 178110 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 217682760020 in words is "two hundred seventeen billion, six hundred eighty-two million, seven hundred sixty thousand, twenty".