20643014 has 12 divisors (see below), whose sum is σ = 36020124. Its totient is φ = 8846964.

The previous prime is 20642971. The next prime is 20643043. The reversal of 20643014 is 41034602.

It is a happy number.

It is a super-2 number, since 2×20643014² = 852268054008392, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105224 + ... + 105419.

It is an arithmetic number, because the mean of its divisors is an integer number (3001677).

Almost surely, 2^20643014 is an apocalyptic number.

20643014 is a deficient number, since it is larger than the sum of its proper divisors (15377110).

20643014 is a wasteful number, since it uses less digits than its factorization.

20643014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210659 (or 210652 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20643014 is about 4543.4583744104. The cubic root of 20643014 is about 274.3201454431.

Adding to 20643014 its reverse (41034602), we get a palindrome (61677616).

The spelling of 20643014 in words is "twenty million, six hundred forty-three thousand, fourteen".