20794751 has 4 divisors (see below), whose sum is σ = 20829072. Its totient is φ = 20760432.

The previous prime is 20794747. The next prime is 20794771. The reversal of 20794751 is 15749702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15749702 = 2 ⋅7874851.

It is a cyclic number.

It is not a de Polignac number, because 20794751 - 2² = 20794747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20794771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16235 + ... + 17468.

It is an arithmetic number, because the mean of its divisors is an integer number (5207268).

Almost surely, 2^20794751 is an apocalyptic number.

20794751 is a deficient number, since it is larger than the sum of its proper divisors (34321).

20794751 is an equidigital number, since it uses as much as digits as its factorization.

20794751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34320.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 20794751 is about 4560.1262043939. The cubic root of 20794751 is about 274.9906376978.

The spelling of 20794751 in words is "twenty million, seven hundred ninety-four thousand, seven hundred fifty-one".