20165147 has 8 divisors (see below), whose sum is σ = 20428800. Its totient is φ = 19903464.

The previous prime is 20165143. The next prime is 20165149. The reversal of 20165147 is 74156102.

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 20165147 - 2² = 20165143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20165141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32918 + ... + 33524.

It is an arithmetic number, because the mean of its divisors is an integer number (2553600).

Almost surely, 2^20165147 is an apocalyptic number.

20165147 is a deficient number, since it is larger than the sum of its proper divisors (263653).

20165147 is a wasteful number, since it uses less digits than its factorization.

20165147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20165147 is about 4490.5619915552. The cubic root of 20165147 is about 272.1868444809.

The spelling of 20165147 in words is "twenty million, one hundred sixty-five thousand, one hundred forty-seven".