20013946 has 4 divisors (see below), whose sum is σ = 30020922. Its totient is φ = 10006972.

The previous prime is 20013937. The next prime is 20013971. The reversal of 20013946 is 64931002.

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., 16362025 + 3651921 = 4045^2 + 1911^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20013946.

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, 5003485 + ... + 5003488.

Almost surely, 2^20013946 is an apocalyptic number.

20013946 is a deficient number, since it is larger than the sum of its proper divisors (10006976).

20013946 is a wasteful number, since it uses less digits than its factorization.

20013946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006975.

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

The square root of 20013946 is about 4473.6948934857. The cubic root of 20013946 is about 271.5048391139.

Adding to 20013946 its reverse (64931002), we get a palindrome (84944948).

The spelling of 20013946 in words is "twenty million, thirteen thousand, nine hundred forty-six".