20039146 has 4 divisors (see below), whose sum is σ = 30058722. Its totient is φ = 10019572.

The previous prime is 20039099. The next prime is 20039191. The reversal of 20039146 is 64193002.

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

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 2524921 = 4185^2 + 1589^2 .

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 20039146.

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 as a sum of consecutive naturals, namely, 5009785 + ... + 5009788.

Almost surely, 2^20039146 is an apocalyptic number.

20039146 is a deficient number, since it is larger than the sum of its proper divisors (10019576).

20039146 is a wasteful number, since it uses less digits than its factorization.

20039146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10019575.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20039146 is about 4476.5104713381. The cubic root of 20039146 is about 271.6187438939.

The spelling of 20039146 in words is "twenty million, thirty-nine thousand, one hundred forty-six".