20395349 has 4 divisors (see below), whose sum is σ = 21964236. Its totient is φ = 18826464.

The previous prime is 20395343. The next prime is 20395363. The reversal of 20395349 is 94359302.

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 13557124 + 6838225 = 3682^2 + 2615^2 .

It is a cyclic number.

It is not a de Polignac number, because 20395349 - 2⁸ = 20395093 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 (20395343) 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, 784424 + ... + 784449.

It is an arithmetic number, because the mean of its divisors is an integer number (5491059).

Almost surely, 2^20395349 is an apocalyptic number.

It is an amenable number.

20395349 is a deficient number, since it is larger than the sum of its proper divisors (1568887).

20395349 is a wasteful number, since it uses less digits than its factorization.

20395349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568886.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 20395349 is about 4516.1210125505. The cubic root of 20395349 is about 273.2186747265.

The spelling of 20395349 in words is "twenty million, three hundred ninety-five thousand, three hundred forty-nine".