20702071056 has 20 divisors (see below), whose sum is σ = 53480350352. Its totient is φ = 6900690336.

The previous prime is 20702071031. The next prime is 20702071111. The reversal of 20702071056 is 65017020702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215646526 + ... + 215646621.

Almost surely, 2^20702071056 is an apocalyptic number.

It is an amenable number.

20702071056 is an abundant number, since it is smaller than the sum of its proper divisors (32778279296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20702071056 is a wasteful number, since it uses less digits than its factorization.

20702071056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431293158 (or 431293152 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

Adding to 20702071056 its reverse (65017020702), we get a palindrome (85719091758).

The spelling of 20702071056 in words is "twenty billion, seven hundred two million, seventy-one thousand, fifty-six".