20165045 has 4 divisors (see below), whose sum is σ = 24198060. Its totient is φ = 16132032.

The previous prime is 20165027. The next prime is 20165051. The reversal of 20165045 is 54056102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6754801 + 13410244 = 2599^2 + 3662^2 .

It is a cyclic number.

It is not a de Polignac number, because 20165045 - 2⁶ = 20164981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20165045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016500 + ... + 2016509.

It is an arithmetic number, because the mean of its divisors is an integer number (6049515).

Almost surely, 2^20165045 is an apocalyptic number.

It is an amenable number.

20165045 is a deficient number, since it is larger than the sum of its proper divisors (4033015).

20165045 is an equidigital number, since it uses as much as digits as its factorization.

20165045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033014.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20165045 is about 4490.5506343877. The cubic root of 20165045 is about 272.1863855520.

The spelling of 20165045 in words is "twenty million, one hundred sixty-five thousand, forty-five".