20641046 has 4 divisors (see below), whose sum is σ = 30961572. Its totient is φ = 10320522.

The previous prime is 20641039. The next prime is 20641057. The reversal of 20641046 is 64014602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64014602 = 2 ⋅32007301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5160260 + ... + 5160263.

It is an arithmetic number, because the mean of its divisors is an integer number (7740393).

Almost surely, 2^20641046 is an apocalyptic number.

20641046 is a deficient number, since it is larger than the sum of its proper divisors (10320526).

20641046 is a wasteful number, since it uses less digits than its factorization.

20641046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10320525.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20641046 is about 4543.2417941377. The cubic root of 20641046 is about 274.3114277367.

Adding to 20641046 its reverse (64014602), we get a palindrome (84655648).

The spelling of 20641046 in words is "twenty million, six hundred forty-one thousand, forty-six".