21160082304 has 256 divisors, whose sum is σ = 63683496000. Its totient is φ = 7002132480.

The previous prime is 21160082303. The next prime is 21160082341. The reversal of 21160082304 is 40328006112.

21160082304 is a `hidden beast` number, since 21 + 1 + 600 + 8 + 2 + 30 + 4 = 666.

It is a super-2 number, since 2×21160082304² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160082303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75302644 + ... + 75302924.

Almost surely, 2^21160082304 is an apocalyptic number.

21160082304 is a gapful number since it is divisible by the number (24) 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 21160082304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31841748000).

21160082304 is an abundant number, since it is smaller than the sum of its proper divisors (42523413696).

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

21160082304 is an frugal number, since it uses more digits than its factorization.

21160082304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 21160082304 its reverse (40328006112), we get a palindrome (61488088416).

The spelling of 21160082304 in words is "twenty-one billion, one hundred sixty million, eighty-two thousand, three hundred four".