20784986270 has 16 divisors (see below), whose sum is σ = 37473427440. Its totient is φ = 8300560704.

The previous prime is 20784986263. The next prime is 20784986279. The reversal of 20784986270 is 7268948702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20784986279) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1672727 + ... + 1685106.

It is an arithmetic number, because the mean of its divisors is an integer number (2342089215).

Almost surely, 2^20784986270 is an apocalyptic number.

20784986270 is a deficient number, since it is larger than the sum of its proper divisors (16688441170).

20784986270 is a wasteful number, since it uses less digits than its factorization.

20784986270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358459.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 20784986270 in words is "twenty billion, seven hundred eighty-four million, nine hundred eighty-six thousand, two hundred seventy".