9421820 has 12 divisors (see below), whose sum is σ = 19785864. Its totient is φ = 3768720.

The previous prime is 9421817. The next prime is 9421823. The reversal of 9421820 is 281249.

It is an interprime number because it is at equal distance from previous prime (9421817) and next prime (9421823).

It is a super-2 number, since 2×9421820² = 177541384224800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9421820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9421823) 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, 235526 + ... + 235565.

It is an arithmetic number, because the mean of its divisors is an integer number (1648822).

Almost surely, 2^9421820 is an apocalyptic number.

It is an amenable number.

9421820 is an abundant number, since it is smaller than the sum of its proper divisors (10364044).

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

9421820 is a wasteful number, since it uses less digits than its factorization.

9421820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471100 (or 471098 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 9421820 is about 3069.4983303465. The cubic root of 9421820 is about 211.2086015302.

The spelling of 9421820 in words is "nine million, four hundred twenty-one thousand, eight hundred twenty".