20165047 has 8 divisors (see below), whose sum is σ = 23133600. Its totient is φ = 17218464.

The previous prime is 20165027. The next prime is 20165051. The reversal of 20165047 is 74056102.

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 20165047 - 2⁷ = 20164919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165017) 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, 3472 + ... + 7237.

It is an arithmetic number, because the mean of its divisors is an integer number (2891700).

Almost surely, 2^20165047 is an apocalyptic number.

20165047 is a deficient number, since it is larger than the sum of its proper divisors (2968553).

20165047 is a wasteful number, since it uses less digits than its factorization.

20165047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10985.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20165047 is about 4490.5508570776. The cubic root of 20165047 is about 272.1863945506.

The spelling of 20165047 in words is "twenty million, one hundred sixty-five thousand, forty-seven".