20786718976 has 27 divisors (see below), whose sum is σ = 41496844963. Its totient is φ = 10392206080.

The previous prime is 20786718971. The next prime is 20786718983. The reversal of 20786718976 is 67981768702.

The square root of 20786718976 is 144176.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20786718971) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2302311 + ... + 2311321.

Almost surely, 2^20786718976 is an apocalyptic number.

20786718976 is the 144176-th square number.

It is an amenable number.

20786718976 is a deficient number, since it is larger than the sum of its proper divisors (20710125987).

20786718976 is an frugal number, since it uses more digits than its factorization.

20786718976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18038 (or 9013 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 61.

The spelling of 20786718976 in words is "twenty billion, seven hundred eighty-six million, seven hundred eighteen thousand, nine hundred seventy-six".