21783332852075 has 12 divisors (see below), whose sum is σ = 27011398988688. Its totient is φ = 17426623538400.

The previous prime is 21783332852009. The next prime is 21783332852131. The reversal of 21783332852075 is 57025823338712.

It is a de Polignac number, because none of the positive numbers 2^k-21783332852075 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21783332852075.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12916970 + ... + 14505680.

It is an arithmetic number, because the mean of its divisors is an integer number (2250949915724).

Almost surely, 2^{21783332852075} is an apocalyptic number.

21783332852075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21783332852075 is a deficient number, since it is larger than the sum of its proper divisors (5228066136613).

21783332852075 is a wasteful number, since it uses less digits than its factorization.

21783332852075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137174 (or 2137169 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 56.

The spelling of 21783332852075 in words is "twenty-one trillion, seven hundred eighty-three billion, three hundred thirty-two million, eight hundred fifty-two thousand, seventy-five".