211704204720 has 160 divisors (see below), whose sum is σ = 685056724992. Its totient is φ = 53981019136.

The previous prime is 211704204689. The next prime is 211704204737. The reversal of 211704204720 is 27402407112.

It is a super-2 number, since 2×211704204720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22776394 + ... + 22785686.

Almost surely, 2^211704204720 is an apocalyptic number.

211704204720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211704204720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342528362496).

211704204720 is an abundant number, since it is smaller than the sum of its proper divisors (473352520272).

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

211704204720 is a wasteful number, since it uses less digits than its factorization.

211704204720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13459 (or 13453 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The spelling of 211704204720 in words is "two hundred eleven billion, seven hundred four million, two hundred four thousand, seven hundred twenty".