20145466 has 8 divisors (see below), whose sum is σ = 32965344. Its totient is φ = 9157020.

The previous prime is 20145449. The next prime is 20145487. The reversal of 20145466 is 66454102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457830 + ... + 457873.

It is an arithmetic number, because the mean of its divisors is an integer number (4120668).

Almost surely, 2^20145466 is an apocalyptic number.

20145466 is a deficient number, since it is larger than the sum of its proper divisors (12819878).

20145466 is a wasteful number, since it uses less digits than its factorization.

20145466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915716.

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

The square root of 20145466 is about 4488.3700827806. The cubic root of 20145466 is about 272.0982650291.

Adding to 20145466 its reverse (66454102), we get a palindrome (86599568).

The spelling of 20145466 in words is "twenty million, one hundred forty-five thousand, four hundred sixty-six".