9091020020 has 48 divisors (see below), whose sum is σ = 19930555008. Its totient is φ = 3476668800.

The previous prime is 9091020013. The next prime is 9091020031. The reversal of 9091020020 is 200201909.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 1515467 + ... + 1521453.

It is an arithmetic number, because the mean of its divisors is an integer number (415219896).

Almost surely, 2^9091020020 is an apocalyptic number.

It is an amenable number.

9091020020 is an abundant number, since it is smaller than the sum of its proper divisors (10839534988).

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

9091020020 is a wasteful number, since it uses less digits than its factorization.

9091020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9320 (or 9318 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 9091020020 is about 95346.8406398450. The cubic root of 9091020020 is about 2087.0725113129.

Adding to 9091020020 its reverse (200201909), we get a palindrome (9291221929).

The spelling of 9091020020 in words is "nine billion, ninety-one million, twenty thousand, twenty".