320220020 has 24 divisors (see below), whose sum is σ = 676594464. Its totient is φ = 127300896.

The previous prime is 320219983. The next prime is 320220023. The reversal of 320220020 is 20022023.

It is a super-2 number, since 2×320220020² = 205081722417600800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320219983 and 320220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320220023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45854 + ... + 52373.

It is an arithmetic number, because the mean of its divisors is an integer number (28191436).

Almost surely, 2^320220020 is an apocalyptic number.

It is an amenable number.

320220020 is an abundant number, since it is smaller than the sum of its proper divisors (356374444).

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

320220020 is a wasteful number, since it uses less digits than its factorization.

320220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98399 (or 98397 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 320220020 is about 17894.6925092330. The cubic root of 320220020 is about 684.1471048014.

Adding to 320220020 its reverse (20022023), we get a palindrome (340242043).

The spelling of 320220020 in words is "three hundred twenty million, two hundred twenty thousand, twenty".