9090020 has 12 divisors (see below), whose sum is σ = 19089084. Its totient is φ = 3636000.

The previous prime is 9090017. The next prime is 9090023. The reversal of 9090020 is 200909.

9090020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9090017) and next prime (9090023).

It can be written as a sum of positive squares in 2 ways, for example, as 7107556 + 1982464 = 2666^2 + 1408^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 454501 = 9090020 / (9 + 0 + 9 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 9089974 and 9090001.

It is not an unprimeable number, because it can be changed into a prime (9090023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227231 + ... + 227270.

It is an arithmetic number, because the mean of its divisors is an integer number (1590757).

Almost surely, 2^9090020 is an apocalyptic number.

It is an amenable number.

9090020 is an abundant number, since it is smaller than the sum of its proper divisors (9999064).

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

9090020 is a wasteful number, since it uses less digits than its factorization.

9090020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454510 (or 454508 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 9090020 is about 3014.9660031251. The cubic root of 9090020 is about 208.6995981918.

Adding to 9090020 its reverse (200909), we get a palindrome (9290929).

The spelling of 9090020 in words is "nine million, ninety thousand, twenty".