20746558317 has 8 divisors (see below), whose sum is σ = 28041010624. Its totient is φ = 13641572448.

The previous prime is 20746558309. The next prime is 20746558319. The reversal of 20746558317 is 71385564702.

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

It is not a de Polignac number, because 20746558317 - 2³ = 20746558309 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 (20746558319) 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, 47366353 + ... + 47366790.

It is an arithmetic number, because the mean of its divisors is an integer number (3505126328).

Almost surely, 2^20746558317 is an apocalyptic number.

It is an amenable number.

20746558317 is a deficient number, since it is larger than the sum of its proper divisors (7294452307).

20746558317 is an equidigital number, since it uses as much as digits as its factorization.

20746558317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94733219.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 20746558317 in words is "twenty billion, seven hundred forty-six million, five hundred fifty-eight thousand, three hundred seventeen".