20313032220 has 144 divisors (see below), whose sum is σ = 66555390720. Its totient is φ = 4985100288.

The previous prime is 20313032197. The next prime is 20313032237. The reversal of 20313032220 is 2223031302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20313032193 and 20313032202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 775701 + ... + 801459.

Almost surely, 2^20313032220 is an apocalyptic number.

20313032220 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 20313032220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33277695360).

20313032220 is an abundant number, since it is smaller than the sum of its proper divisors (46242358500).

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

20313032220 is a wasteful number, since it uses less digits than its factorization.

20313032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26124 (or 26119 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20313032220 its reverse (2223031302), we get a palindrome (22536063522).

The spelling of 20313032220 in words is "twenty billion, three hundred thirteen million, thirty-two thousand, two hundred twenty".