20047165 has 8 divisors (see below), whose sum is σ = 25471800. Its totient is φ = 15094272.

The previous prime is 20047151. The next prime is 20047177. The reversal of 20047165 is 56174002.

It can be written as a sum of positive squares in 4 ways, for example, as 1505529 + 18541636 = 1227^2 + 4306^2 .

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 20047165 - 2⁵ = 20047133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117840 + ... + 118009.

It is an arithmetic number, because the mean of its divisors is an integer number (3183975).

Almost surely, 2^20047165 is an apocalyptic number.

It is an amenable number.

20047165 is a deficient number, since it is larger than the sum of its proper divisors (5424635).

20047165 is a wasteful number, since it uses less digits than its factorization.

20047165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235871.

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

The square root of 20047165 is about 4477.4060570826. The cubic root of 20047165 is about 271.6549699925.

The spelling of 20047165 in words is "twenty million, forty-seven thousand, one hundred sixty-five".