20767020717 has 16 divisors (see below), whose sum is σ = 27792376128. Its totient is φ = 13793220480.

The previous prime is 20767020713. The next prime is 20767020719. The reversal of 20767020717 is 71702076702.

It is not a de Polignac number, because 20767020717 - 2² = 20767020713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20767020713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2259343 + ... + 2268515.

It is an arithmetic number, because the mean of its divisors is an integer number (1737023508).

Almost surely, 2^20767020717 is an apocalyptic number.

It is an amenable number.

20767020717 is a deficient number, since it is larger than the sum of its proper divisors (7025355411).

20767020717 is a wasteful number, since it uses less digits than its factorization.

20767020717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11900.

The product of its (nonzero) digits is 57624, while the sum is 39.

The spelling of 20767020717 in words is "twenty billion, seven hundred sixty-seven million, twenty thousand, seven hundred seventeen".