20145338 has 8 divisors (see below), whose sum is σ = 30263220. Its totient is φ = 10057600.

The previous prime is 20145329. The next prime is 20145341. The reversal of 20145338 is 83354102.

It can be written as a sum of positive squares in 2 ways, for example, as 18861649 + 1283689 = 4343^2 + 1133^2 .

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, 5783 + ... + 8586.

Almost surely, 2^20145338 is an apocalyptic number.

20145338 is a deficient number, since it is larger than the sum of its proper divisors (10117882).

20145338 is a wasteful number, since it uses less digits than its factorization.

20145338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15072.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20145338 is about 4488.3558236842. The cubic root of 20145338 is about 272.0976887431.

The spelling of 20145338 in words is "twenty million, one hundred forty-five thousand, three hundred thirty-eight".