20049305 has 4 divisors (see below), whose sum is σ = 24059172. Its totient is φ = 16039440.

The previous prime is 20049277. The next prime is 20049311. The reversal of 20049305 is 50394002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7546009 + 12503296 = 2747^2 + 3536^2 .

It is not a de Polignac number, because 20049305 - 2⁶ = 20049241 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, 2004926 + ... + 2004935.

It is an arithmetic number, because the mean of its divisors is an integer number (6014793).

Almost surely, 2^20049305 is an apocalyptic number.

It is an amenable number.

20049305 is a deficient number, since it is larger than the sum of its proper divisors (4009867).

20049305 is an equidigital number, since it uses as much as digits as its factorization.

20049305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009866.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20049305 is about 4477.6450283603. The cubic root of 20049305 is about 271.6646358805.

The spelling of 20049305 in words is "twenty million, forty-nine thousand, three hundred five".