21063792903840 has 192 divisors, whose sum is σ = 74109263800320. Its totient is φ = 5587602785280.

The previous prime is 21063792903823. The next prime is 21063792903997. The reversal of 21063792903840 is 4830929736012.

21063792903840 is a `hidden beast` number, since 2 + 106 + 3 + 79 + 2 + 90 + 384 + 0 = 666.

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

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 31 ways as a sum of consecutive naturals, for example, 11938959 + ... + 13589198.

It is an arithmetic number, because the mean of its divisors is an integer number (385985748960).

Almost surely, 2^{21063792903840} is an apocalyptic number.

21063792903840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21063792903840 is an abundant number, since it is smaller than the sum of its proper divisors (53045470896480).

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

21063792903840 is a wasteful number, since it uses less digits than its factorization.

21063792903840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25528372 (or 25528358 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 21063792903840 in words is "twenty-one trillion, sixty-three billion, seven hundred ninety-two million, nine hundred three thousand, eight hundred forty".