11321665620 has 96 divisors (see below), whose sum is σ = 32759086080. Its totient is φ = 2918522880.

The previous prime is 11321665601. The next prime is 11321665669. The reversal of 11321665620 is 2656612311.

It is a super-2 number, since 2×11321665620² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2030196 + ... + 2035764.

It is an arithmetic number, because the mean of its divisors is an integer number (341240480).

Almost surely, 2^11321665620 is an apocalyptic number.

11321665620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11321665620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16379543040).

11321665620 is an abundant number, since it is smaller than the sum of its proper divisors (21437420460).

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

11321665620 is a wasteful number, since it uses less digits than its factorization.

11321665620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705 (or 6703 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

It can be divided in two parts, 1132166 and 5620, that added together give a triangular number (1137786 = T₁₅₀₈).

The spelling of 11321665620 in words is "eleven billion, three hundred twenty-one million, six hundred sixty-five thousand, six hundred twenty".