20245394 has 16 divisors (see below), whose sum is σ = 32778648. Its totient is φ = 9322752.

The previous prime is 20245369. The next prime is 20245399. The reversal of 20245394 is 49354202.

It can be written as a sum of positive squares in 4 ways, for example, as 18105025 + 2140369 = 4255^2 + 1463^2 .

It is not an unprimeable number, because it can be changed into a prime (20245399) 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 7 ways as a sum of consecutive naturals, for example, 20234 + ... + 21210.

Almost surely, 2^20245394 is an apocalyptic number.

20245394 is a deficient number, since it is larger than the sum of its proper divisors (12533254).

20245394 is a wasteful number, since it uses less digits than its factorization.

20245394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20245394 is about 4499.4881931171. The cubic root of 20245394 is about 272.5474215369.

Adding to 20245394 its reverse (49354202), we get a palindrome (69599596).

The spelling of 20245394 in words is "twenty million, two hundred forty-five thousand, three hundred ninety-four".