21340689822720 has 1408 divisors, whose sum is σ = 79698475745280. Its totient is φ = 5409169735680.

The previous prime is 21340689822719. The next prime is 21340689822733. The reversal of 21340689822720 is 2722898604312.

21340689822720 is a `hidden beast` number, since 2 + 1 + 3 + 406 + 8 + 9 + 8 + 227 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 95698160529 + ... + 95698160751.

Almost surely, 2^{21340689822720} is an apocalyptic number.

21340689822720 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 21340689822720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39849237872640).

21340689822720 is an abundant number, since it is smaller than the sum of its proper divisors (58357785922560).

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

21340689822720 is a wasteful number, since it uses less digits than its factorization.

21340689822720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 21340689822720 in words is "twenty-one trillion, three hundred forty billion, six hundred eighty-nine million, eight hundred twenty-two thousand, seven hundred twenty".