20295109 has 4 divisors (see below), whose sum is σ = 20322540. Its totient is φ = 20267680.

The previous prime is 20295101. The next prime is 20295113. The reversal of 20295109 is 90159202.

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 9424900 + 10870209 = 3070^2 + 3297^2 .

It is a cyclic number.

It is not a de Polignac number, because 20295109 - 2³ = 20295101 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 (20295101) 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, 12574 + ... + 14095.

It is an arithmetic number, because the mean of its divisors is an integer number (5080635).

Almost surely, 2^20295109 is an apocalyptic number.

It is an amenable number.

20295109 is a deficient number, since it is larger than the sum of its proper divisors (27431).

20295109 is an equidigital number, since it uses as much as digits as its factorization.

20295109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27430.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20295109 is about 4505.0093229648. The cubic root of 20295109 is about 272.7703301682.

The spelling of 20295109 in words is "twenty million, two hundred ninety-five thousand, one hundred nine".