20182045 has 16 divisors (see below), whose sum is σ = 26721072. Its totient is φ = 14538240.

The previous prime is 20182039. The next prime is 20182049. The reversal of 20182045 is 54028102.

It can be written as a sum of positive squares in 8 ways, for example, as 636804 + 19545241 = 798^2 + 4421^2 .

It is not a de Polignac number, because 20182045 - 2⁵ = 20182013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20182049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (1670067).

Almost surely, 2^20182045 is an apocalyptic number.

It is an amenable number.

20182045 is a deficient number, since it is larger than the sum of its proper divisors (6539027).

20182045 is a wasteful number, since it uses less digits than its factorization.

20182045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20182045 is about 4492.4430992501. The cubic root of 20182045 is about 272.2628523433.

The spelling of 20182045 in words is "twenty million, one hundred eighty-two thousand, forty-five".