20094643 has 4 divisors (see below), whose sum is σ = 20159568. Its totient is φ = 20029720.

The previous prime is 20094623. The next prime is 20094649. The reversal of 20094643 is 34649002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34649002 = 2 ⋅17324501.

It is a cyclic number.

It is not a de Polignac number, because 20094643 - 2⁵ = 20094611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20094649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31996 + ... + 32617.

It is an arithmetic number, because the mean of its divisors is an integer number (5039892).

Almost surely, 2^20094643 is an apocalyptic number.

20094643 is a deficient number, since it is larger than the sum of its proper divisors (64925).

20094643 is an equidigital number, since it uses as much as digits as its factorization.

20094643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64924.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 20094643 is about 4482.7048754073. The cubic root of 20094643 is about 271.8692557557.

The spelling of 20094643 in words is "twenty million, ninety-four thousand, six hundred forty-three".