9720020 has 24 divisors (see below), whose sum is σ = 21487200. Its totient is φ = 3683232.

The previous prime is 9719989. The next prime is 9720031. The reversal of 9720020 is 200279.

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 = 9719974 and 9720001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12410 + ... + 13169.

It is an arithmetic number, because the mean of its divisors is an integer number (895300).

Almost surely, 2^9720020 is an apocalyptic number.

It is an amenable number.

9720020 is an abundant number, since it is smaller than the sum of its proper divisors (11767180).

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

9720020 is a wasteful number, since it uses less digits than its factorization.

9720020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25607 (or 25605 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 9720020 is about 3117.6946611238. The cubic root of 9720020 is about 213.4137446435.

Adding to 9720020 its reverse (200279), we get a palindrome (9920299).

The spelling of 9720020 in words is "nine million, seven hundred twenty thousand, twenty".