20883012705 has 32 divisors (see below), whose sum is σ = 37279461120. Its totient is φ = 11091375360.

The previous prime is 20883012673. The next prime is 20883012743. The reversal of 20883012705 is 50721038802.

20883012705 is a `hidden beast` number, since 2 + 0 + 88 + 301 + 270 + 5 = 666.

It is not a de Polignac number, because 20883012705 - 2⁵ = 20883012673 is a prime.

It is a super-2 number, since 2×20883012705² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20883012705.

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, 288397 + ... + 353466.

It is an arithmetic number, because the mean of its divisors is an integer number (1164983160).

Almost surely, 2^20883012705 is an apocalyptic number.

It is an amenable number.

20883012705 is a deficient number, since it is larger than the sum of its proper divisors (16396448415).

20883012705 is a wasteful number, since it uses less digits than its factorization.

20883012705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642118 (or 642112 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 20883012705 in words is "twenty billion, eight hundred eighty-three million, twelve thousand, seven hundred five".