20004646 has 4 divisors (see below), whose sum is σ = 30006972. Its totient is φ = 10002322.

The previous prime is 20004583. The next prime is 20004667. The reversal of 20004646 is 64640002.

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

It is a congruent number.

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, 5001160 + ... + 5001163.

It is an arithmetic number, because the mean of its divisors is an integer number (7501743).

Almost surely, 2^20004646 is an apocalyptic number.

20004646 is a deficient number, since it is larger than the sum of its proper divisors (10002326).

20004646 is a wasteful number, since it uses less digits than its factorization.

20004646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002325.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20004646 is about 4472.6553634279. The cubic root of 20004646 is about 271.4627786726.

Adding to 20004646 its reverse (64640002), we get a palindrome (84644648).

The spelling of 20004646 in words is "twenty million, four thousand, six hundred forty-six".