20706853684 has 24 divisors (see below), whose sum is σ = 39842546688. Its totient is φ = 9338091840.

The previous prime is 20706853681. The next prime is 20706853753. The reversal of 20706853684 is 48635860702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706853681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847209 + ... + 1858384.

It is an arithmetic number, because the mean of its divisors is an integer number (1660106112).

Almost surely, 2^20706853684 is an apocalyptic number.

It is an amenable number.

20706853684 is a deficient number, since it is larger than the sum of its proper divisors (19135693004).

20706853684 is a wasteful number, since it uses less digits than its factorization.

20706853684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705735 (or 3705733 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 20706853684 in words is "twenty billion, seven hundred six million, eight hundred fifty-three thousand, six hundred eighty-four".