21040835083488 has 144 divisors (see below), whose sum is σ = 65287689523056. Its totient is φ = 6374713374720.

The previous prime is 21040835083441. The next prime is 21040835083517. The reversal of 21040835083488 is 88438053804012.

21040835083488 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 0 + 83 + 5 + 0 + 83 + 488 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×21040835083488² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14954556 + ... + 16300932.

It is an arithmetic number, because the mean of its divisors is an integer number (453386732799).

Almost surely, 2^{21040835083488} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21040835083488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32643844761528).

21040835083488 is an abundant number, since it is smaller than the sum of its proper divisors (44246854439568).

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

21040835083488 is a wasteful number, since it uses less digits than its factorization.

21040835083488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351337 (or 1351326 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 21040835083488 in words is "twenty-one trillion, forty billion, eight hundred thirty-five million, eighty-three thousand, four hundred eighty-eight".