20746395917 has 8 divisors (see below), whose sum is σ = 22349715360. Its totient is φ = 19144139760.

The previous prime is 20746395883. The next prime is 20746395941. The reversal of 20746395917 is 71959364702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20746395917 - 2³² = 16451428621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20746395977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225059 + ... + 303552.

It is an arithmetic number, because the mean of its divisors is an integer number (2793714420).

Almost surely, 2^20746395917 is an apocalyptic number.

It is an amenable number.

20746395917 is a deficient number, since it is larger than the sum of its proper divisors (1603319443).

20746395917 is a wasteful number, since it uses less digits than its factorization.

20746395917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531643.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 20746395917 in words is "twenty billion, seven hundred forty-six million, three hundred ninety-five thousand, nine hundred seventeen".