20343013220 has 24 divisors (see below), whose sum is σ = 43420663608. Its totient is φ = 8003808000.

The previous prime is 20343013219. The next prime is 20343013231. The reversal of 20343013220 is 2231034302.

It can be written as a sum of positive squares in 4 ways, for example, as 172764736 + 20170248484 = 13144^2 + 142022^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20343013192 and 20343013201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8336081 + ... + 8338520.

It is an arithmetic number, because the mean of its divisors is an integer number (1809194317).

Almost surely, 2^20343013220 is an apocalyptic number.

20343013220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20343013220 is an abundant number, since it is smaller than the sum of its proper divisors (23077650388).

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

20343013220 is a wasteful number, since it uses less digits than its factorization.

20343013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16674671 (or 16674669 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 20343013220 its reverse (2231034302), we get a palindrome (22574047522).

The spelling of 20343013220 in words is "twenty billion, three hundred forty-three million, thirteen thousand, two hundred twenty".