220031223320 has 64 divisors (see below), whose sum is σ = 499320283680. Its totient is φ = 87259401216.

The previous prime is 220031223301. The next prime is 220031223337. The reversal of 220031223320 is 23322130022.

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 = 220031223292 and 220031223301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2831627 + ... + 2908293.

Almost surely, 2^220031223320 is an apocalyptic number.

220031223320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220031223320 is an abundant number, since it is smaller than the sum of its proper divisors (279289060360).

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

220031223320 is a wasteful number, since it uses less digits than its factorization.

220031223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77292 (or 77288 counting only the distinct ones).

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

Adding to 220031223320 its reverse (23322130022), we get a palindrome (243353353342).

The spelling of 220031223320 in words is "two hundred twenty billion, thirty-one million, two hundred twenty-three thousand, three hundred twenty".