21823194793680 has 480 divisors, whose sum is σ = 88923316579200. Its totient is φ = 4903612342272.

The previous prime is 21823194793637. The next prime is 21823194793691. The reversal of 21823194793680 is 8639749132812.

21823194793680 is a `hidden beast` number, since 2 + 1 + 82 + 3 + 1 + 9 + 479 + 3 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4497184 + ... + 7991936.

It is an arithmetic number, because the mean of its divisors is an integer number (185256909540).

Almost surely, 2^{21823194793680} is an apocalyptic number.

21823194793680 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 21823194793680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44461658289600).

21823194793680 is an abundant number, since it is smaller than the sum of its proper divisors (67100121785520).

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

21823194793680 is a wasteful number, since it uses less digits than its factorization.

21823194793680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3494848 (or 3494829 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 21823194793680 in words is "twenty-one trillion, eight hundred twenty-three billion, one hundred ninety-four million, seven hundred ninety-three thousand, six hundred eighty".