20294905 has 4 divisors (see below), whose sum is σ = 24353892. Its totient is φ = 16235920.

The previous prime is 20294893. The next prime is 20294917. The reversal of 20294905 is 50949202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20294893) and next prime (20294917).

It can be written as a sum of positive squares in 2 ways, for example, as 10106041 + 10188864 = 3179^2 + 3192^2 .

It is not a de Polignac number, because 20294905 - 2⁷ = 20294777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029486 + ... + 2029495.

It is an arithmetic number, because the mean of its divisors is an integer number (6088473).

Almost surely, 2^20294905 is an apocalyptic number.

It is an amenable number.

20294905 is a deficient number, since it is larger than the sum of its proper divisors (4058987).

20294905 is an equidigital number, since it uses as much as digits as its factorization.

20294905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4058986.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20294905 is about 4504.9866814454. The cubic root of 20294905 is about 272.7694162315.

The spelling of 20294905 in words is "twenty million, two hundred ninety-four thousand, nine hundred five".