20466145 has 16 divisors (see below), whose sum is σ = 28182528. Its totient is φ = 13976640.

The previous prime is 20466139. The next prime is 20466179. The reversal of 20466145 is 54166402.

It is not a de Polignac number, because 20466145 - 2¹⁵ = 20433377 is a prime.

It is a super-2 number, since 2×20466145² = 837726182322050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8640 + ... + 10750.

It is an arithmetic number, because the mean of its divisors is an integer number (1761408).

Almost surely, 2^20466145 is an apocalyptic number.

It is an amenable number.

20466145 is a deficient number, since it is larger than the sum of its proper divisors (7716383).

20466145 is a wasteful number, since it uses less digits than its factorization.

20466145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20466145 is about 4523.9523649128. The cubic root of 20466145 is about 273.5344403710.

The spelling of 20466145 in words is "twenty million, four hundred sixty-six thousand, one hundred forty-five".