20009159 has 8 divisors (see below), whose sum is σ = 21040320. Its totient is φ = 19000800.

The previous prime is 20009137. The next prime is 20009173. The reversal of 20009159 is 95190002.

It is a happy number.

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

It is not a de Polignac number, because 20009159 - 2⁸ = 20008903 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 (20009659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3887 + ... + 7424.

It is an arithmetic number, because the mean of its divisors is an integer number (2630040).

Almost surely, 2^20009159 is an apocalyptic number.

20009159 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20009159 is a deficient number, since it is larger than the sum of its proper divisors (1031161).

20009159 is a wasteful number, since it uses less digits than its factorization.

20009159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11401.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 20009159 is about 4473.1598451207. The cubic root of 20009159 is about 271.4831909209.

The spelling of 20009159 in words is "twenty million, nine thousand, one hundred fifty-nine".