20106681517 has 8 divisors (see below), whose sum is σ = 21656194560. Its totient is φ = 18557574960.

The previous prime is 20106681509. The next prime is 20106681593. The reversal of 20106681517 is 71518660102.

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 20106681517 - 2³ = 20106681509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20106682517) 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, 5292 + ... + 200602.

It is an arithmetic number, because the mean of its divisors is an integer number (2707024320).

Almost surely, 2^20106681517 is an apocalyptic number.

It is an amenable number.

20106681517 is a deficient number, since it is larger than the sum of its proper divisors (1549513043).

20106681517 is a wasteful number, since it uses less digits than its factorization.

20106681517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203243.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 20106681517 in words is "twenty billion, one hundred six million, six hundred eighty-one thousand, five hundred seventeen".