20726617707 has 12 divisors (see below), whose sum is σ = 29941189824. Its totient is φ = 13816479600.

The previous prime is 20726617657. The next prime is 20726617721. The reversal of 20726617707 is 70771662702.

20726617707 is a `hidden beast` number, since 2 + 0 + 7 + 26 + 617 + 7 + 0 + 7 = 666.

It is not a de Polignac number, because 20726617707 - 2⁶ = 20726617643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20726617757) 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 11 ways as a sum of consecutive naturals, for example, 4273 + ... + 203645.

It is an arithmetic number, because the mean of its divisors is an integer number (2495099152).

Almost surely, 2^20726617707 is an apocalyptic number.

20726617707 is a deficient number, since it is larger than the sum of its proper divisors (9214572117).

20726617707 is a wasteful number, since it uses less digits than its factorization.

20726617707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210930 (or 210927 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The spelling of 20726617707 in words is "twenty billion, seven hundred twenty-six million, six hundred seventeen thousand, seven hundred seven".