217210002020 has 48 divisors (see below), whose sum is σ = 497876694336. Its totient is φ = 78942864000.

The previous prime is 217210002019. The next prime is 217210002041. The reversal of 217210002020 is 20200012712.

It is a self number, because there is not a number n which added to its sum of digits gives 217210002020.

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, 144155 + ... + 674685.

It is an arithmetic number, because the mean of its divisors is an integer number (10372431132).

Almost surely, 2^217210002020 is an apocalyptic number.

217210002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217210002020 is an abundant number, since it is smaller than the sum of its proper divisors (280666692316).

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

217210002020 is a wasteful number, since it uses less digits than its factorization.

217210002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532412 (or 532410 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

Adding to 217210002020 its reverse (20200012712), we get a palindrome (237410014732).

The spelling of 217210002020 in words is "two hundred seventeen billion, two hundred ten million, two thousand, twenty".