20213322320 has 160 divisors (see below), whose sum is σ = 50997084192. Its totient is φ = 7422345216.

The previous prime is 20213322313. The next prime is 20213322329. The reversal of 20213322320 is 2322331202.

It can be written as a sum of positive squares in 16 ways, for example, as 10679824 + 20202642496 = 3268^2 + 142136^2 .

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 = 20213322292 and 20213322301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213322329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13910714 + ... + 13912166.

Almost surely, 2^20213322320 is an apocalyptic number.

20213322320 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 20213322320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25498542096).

20213322320 is an abundant number, since it is smaller than the sum of its proper divisors (30783761872).

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

20213322320 is a wasteful number, since it uses less digits than its factorization.

20213322320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729 (or 1723 counting only the distinct ones).

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

Adding to 20213322320 its reverse (2322331202), we get a palindrome (22535653522).

The spelling of 20213322320 in words is "twenty billion, two hundred thirteen million, three hundred twenty-two thousand, three hundred twenty".