9921324706900 has 36 divisors (see below), whose sum is σ = 22795702536348. Its totient is φ = 3735086947840.

The previous prime is 9921324706877. The next prime is 9921324706901. The reversal of 9921324706900 is 96074231299.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 440664958276 + 9480659748624 = 663826^2 + 3079068^2 .

It is a super-2 number, since 2×9921324706900² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9921324706901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2918034979 + ... + 2918038378.

It is an arithmetic number, because the mean of its divisors is an integer number (633213959343).

Almost surely, 2^{9921324706900} is an apocalyptic number.

It is an amenable number.

9921324706900 is an abundant number, since it is smaller than the sum of its proper divisors (12874377829448).

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

9921324706900 is a wasteful number, since it uses less digits than its factorization.

9921324706900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836073388 (or 5836073381 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 52.

The spelling of 9921324706900 in words is "nine trillion, nine hundred twenty-one billion, three hundred twenty-four million, seven hundred six thousand, nine hundred".