9213919905620 has 24 divisors (see below), whose sum is σ = 19349295729288. Its totient is φ = 3685555785600.

The previous prime is 9213919905583. The next prime is 9213919905637. The reversal of 9213919905620 is 265099193129.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 849781610896 + 8364138294724 = 921836^2 + 2892082^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7783790 + ... + 8889050.

It is an arithmetic number, because the mean of its divisors is an integer number (806220655387).

Almost surely, 2^{9213919905620} is an apocalyptic number.

It is an amenable number.

9213919905620 is an abundant number, since it is smaller than the sum of its proper divisors (10135375823668).

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

9213919905620 is a wasteful number, since it uses less digits than its factorization.

9213919905620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522091 (or 1522089 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 56.

The spelling of 9213919905620 in words is "nine trillion, two hundred thirteen billion, nine hundred nineteen million, nine hundred five thousand, six hundred twenty".