20717137105 has 8 divisors (see below), whose sum is σ = 28412073792. Its totient is φ = 14206036848.

The previous prime is 20717137099. The next prime is 20717137117. The reversal of 20717137105 is 50173171702.

It is a happy number.

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 20717137105 - 2¹⁵ = 20717104337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295959067 + ... + 295959136.

It is an arithmetic number, because the mean of its divisors is an integer number (3551509224).

Almost surely, 2^20717137105 is an apocalyptic number.

It is an amenable number.

20717137105 is a deficient number, since it is larger than the sum of its proper divisors (7694936687).

20717137105 is an equidigital number, since it uses as much as digits as its factorization.

20717137105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591918215.

The product of its (nonzero) digits is 10290, while the sum is 34.

The spelling of 20717137105 in words is "twenty billion, seven hundred seventeen million, one hundred thirty-seven thousand, one hundred five".