20159718 has 8 divisors (see below), whose sum is σ = 40319448. Its totient is φ = 6719904.

The previous prime is 20159693. The next prime is 20159719. The reversal of 20159718 is 81795102.

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

20159718 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20159719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679971 + ... + 1679982.

It is an arithmetic number, because the mean of its divisors is an integer number (5039931).

Almost surely, 2^20159718 is an apocalyptic number.

20159718 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20159718 is a wasteful number, since it uses less digits than its factorization.

20159718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359958.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 20159718 is about 4489.9574608230. The cubic root of 20159718 is about 272.1624156150.

The spelling of 20159718 in words is "twenty million, one hundred fifty-nine thousand, seven hundred eighteen".