20712726784 has 36 divisors (see below), whose sum is σ = 41355853420. Its totient is φ = 10353530880.

The previous prime is 20712726779. The next prime is 20712726791. The reversal of 20712726784 is 48762721702.

It can be written as a sum of positive squares in 2 ways, for example, as 2649366784 + 18063360000 = 51472^2 + 134400^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174222 + ... + 1191730.

Almost surely, 2^20712726784 is an apocalyptic number.

It is an amenable number.

20712726784 is a deficient number, since it is larger than the sum of its proper divisors (20643126636).

20712726784 is an equidigital number, since it uses as much as digits as its factorization.

20712726784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22146 (or 22132 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 20712726784 in words is "twenty billion, seven hundred twelve million, seven hundred twenty-six thousand, seven hundred eighty-four".