21160386182820 has 192 divisors, whose sum is σ = 59891294453760. Its totient is φ = 5581968671232.

The previous prime is 21160386182737. The next prime is 21160386182833. The reversal of 21160386182820 is 2828168306112.

It is a self number, because there is not a number n which added to its sum of digits gives 21160386182820.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3701306602 + ... + 3701312318.

It is an arithmetic number, because the mean of its divisors is an integer number (311933825280).

Almost surely, 2^{21160386182820} is an apocalyptic number.

21160386182820 is a gapful number since it is divisible by the number (20) 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 21160386182820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29945647226880).

21160386182820 is an abundant number, since it is smaller than the sum of its proper divisors (38730908270940).

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

21160386182820 is a wasteful number, since it uses less digits than its factorization.

21160386182820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7594 (or 7592 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 21160386182820 in words is "twenty-one trillion, one hundred sixty billion, three hundred eighty-six million, one hundred eighty-two thousand, eight hundred twenty".