20159147 has 8 divisors (see below), whose sum is σ = 20919600. Its totient is φ = 19403104.

The previous prime is 20159137. The next prime is 20159177. The reversal of 20159147 is 74195102.

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 20159147 - 2⁸ = 20158891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20159107) 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, 10388 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (2614950).

Almost surely, 2^20159147 is an apocalyptic number.

20159147 is a deficient number, since it is larger than the sum of its proper divisors (760453).

20159147 is a wasteful number, since it uses less digits than its factorization.

20159147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 20159147 is about 4489.8938740242. The cubic root of 20159147 is about 272.1598460320.

The spelling of 20159147 in words is "twenty million, one hundred fifty-nine thousand, one hundred forty-seven".