20294791 has 4 divisors (see below), whose sum is σ = 22139784. Its totient is φ = 18449800.

The previous prime is 20294789. The next prime is 20294861. The reversal of 20294791 is 19749202.

It is a happy number.

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 20294791 - 2¹ = 20294789 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 (20294891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922480 + ... + 922501.

It is an arithmetic number, because the mean of its divisors is an integer number (5534946).

Almost surely, 2^20294791 is an apocalyptic number.

20294791 is a deficient number, since it is larger than the sum of its proper divisors (1844993).

20294791 is a wasteful number, since it uses less digits than its factorization.

20294791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844992.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 20294791 is about 4504.9740287820. The cubic root of 20294791 is about 272.7689054995.

The spelling of 20294791 in words is "twenty million, two hundred ninety-four thousand, seven hundred ninety-one".