21183077723808 has 2304 divisors, whose sum is σ = 81730562457600. Its totient is φ = 4662160588800.

The previous prime is 21183077723711. The next prime is 21183077723813. The reversal of 21183077723808 is 80832777038112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 78747500698 + ... + 78747500966.

It is an arithmetic number, because the mean of its divisors is an integer number (35473334400).

Almost surely, 2^{21183077723808} is an apocalyptic number.

21183077723808 is a gapful number since it is divisible by the number (28) 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 21183077723808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40865281228800).

21183077723808 is an abundant number, since it is smaller than the sum of its proper divisors (60547484733792).

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

21183077723808 is a wasteful number, since it uses less digits than its factorization.

21183077723808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 57.

The spelling of 21183077723808 in words is "twenty-one trillion, one hundred eighty-three billion, seventy-seven million, seven hundred twenty-three thousand, eight hundred eight".