20018701705 has 8 divisors (see below), whose sum is σ = 25066896192. Its totient is φ = 15318658608.

The previous prime is 20018701687. The next prime is 20018701721. The reversal of 20018701705 is 50710781002.

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 20018701705 - 2³³ = 11428767113 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, 87037719 + ... + 87037948.

It is an arithmetic number, because the mean of its divisors is an integer number (3133362024).

Almost surely, 2^20018701705 is an apocalyptic number.

It is an amenable number.

20018701705 is a deficient number, since it is larger than the sum of its proper divisors (5048194487).

20018701705 is a wasteful number, since it uses less digits than its factorization.

20018701705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174075695.

The product of its (nonzero) digits is 3920, while the sum is 31.

The spelling of 20018701705 in words is "twenty billion, eighteen million, seven hundred one thousand, seven hundred five".