20793289 has 4 divisors (see below), whose sum is σ = 22683600. Its totient is φ = 18902980.

The previous prime is 20793287. The next prime is 20793293. The reversal of 20793289 is 98239702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20793289 - 2¹ = 20793287 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20793287) 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, 945139 + ... + 945160.

It is an arithmetic number, because the mean of its divisors is an integer number (5670900).

Almost surely, 2^20793289 is an apocalyptic number.

It is an amenable number.

20793289 is a deficient number, since it is larger than the sum of its proper divisors (1890311).

20793289 is a wasteful number, since it uses less digits than its factorization.

20793289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890310.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 20793289 is about 4559.9658989953. The cubic root of 20793289 is about 274.9841930308.

The spelling of 20793289 in words is "twenty million, seven hundred ninety-three thousand, two hundred eighty-nine".