20702040843 has 16 divisors (see below), whose sum is σ = 31696905600. Its totient is φ = 11886338880.

The previous prime is 20702040841. The next prime is 20702040893. The reversal of 20702040843 is 34804020702.

It is not a de Polignac number, because 20702040843 - 2¹ = 20702040841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20702040843.

It is not an unprimeable number, because it can be changed into a prime (20702040841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16508178 + ... + 16509431.

It is an arithmetic number, because the mean of its divisors is an integer number (1981056600).

Almost surely, 2^20702040843 is an apocalyptic number.

20702040843 is a deficient number, since it is larger than the sum of its proper divisors (10994864757).

20702040843 is a wasteful number, since it uses less digits than its factorization.

20702040843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33017642.

The product of its (nonzero) digits is 10752, while the sum is 30.

The spelling of 20702040843 in words is "twenty billion, seven hundred two million, forty thousand, eight hundred forty-three".