20062643 has 4 divisors (see below), whose sum is σ = 20086248. Its totient is φ = 20039040.

The previous prime is 20062597. The next prime is 20062657. The reversal of 20062643 is 34626002.

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

It is a cyclic number.

It is not a de Polignac number, because 20062643 - 2²² = 15868339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20067643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10478 + ... + 12243.

It is an arithmetic number, because the mean of its divisors is an integer number (5021562).

Almost surely, 2^20062643 is an apocalyptic number.

20062643 is a deficient number, since it is larger than the sum of its proper divisors (23605).

20062643 is an equidigital number, since it uses as much as digits as its factorization.

20062643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23604.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20062643 is about 4479.1341797271. The cubic root of 20062643 is about 271.7248650621.

Adding to 20062643 its reverse (34626002), we get a palindrome (54688645).

The spelling of 20062643 in words is "twenty million, sixty-two thousand, six hundred forty-three".