20684229220 has 24 divisors (see below), whose sum is σ = 43696989504. Its totient is φ = 8224147296.

The previous prime is 20684229191. The next prime is 20684229221. The reversal of 20684229220 is 2292248602.

It is a self number, because there is not a number n which added to its sum of digits gives 20684229220.

It is not an unprimeable number, because it can be changed into a prime (20684229221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3093102 + ... + 3099781.

It is an arithmetic number, because the mean of its divisors is an integer number (1820707896).

Almost surely, 2^20684229220 is an apocalyptic number.

20684229220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20684229220 is an abundant number, since it is smaller than the sum of its proper divisors (23012760284).

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

20684229220 is a wasteful number, since it uses less digits than its factorization.

20684229220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193059 (or 6193057 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 20684229220 in words is "twenty billion, six hundred eighty-four million, two hundred twenty-nine thousand, two hundred twenty".