20050643 has 8 divisors (see below), whose sum is σ = 21216000. Its totient is φ = 18896328.

The previous prime is 20050631. The next prime is 20050651. The reversal of 20050643 is 34605002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20050643 - 2¹⁸ = 19788499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20050603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (2652000).

Almost surely, 2^20050643 is an apocalyptic number.

20050643 is a deficient number, since it is larger than the sum of its proper divisors (1165357).

20050643 is a wasteful number, since it uses less digits than its factorization.

20050643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20050643 is about 4477.7944347636. The cubic root of 20050643 is about 271.6706789694.

Adding to 20050643 its reverse (34605002), we get a palindrome (54655645).

The spelling of 20050643 in words is "twenty million, fifty thousand, six hundred forty-three".