20394297 has 24 divisors (see below), whose sum is σ = 36728640. Its totient is φ = 10594080.

The previous prime is 20394263. The next prime is 20394299. The reversal of 20394297 is 79249302.

It is not a de Polignac number, because 20394297 - 2⁶ = 20394233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20394299) 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 23 ways as a sum of consecutive naturals, for example, 14022 + ... + 15407.

It is an arithmetic number, because the mean of its divisors is an integer number (1530360).

Almost surely, 2^20394297 is an apocalyptic number.

It is an amenable number.

20394297 is a deficient number, since it is larger than the sum of its proper divisors (16334343).

20394297 is a wasteful number, since it uses less digits than its factorization.

20394297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29453 (or 29450 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 20394297 is about 4516.0045394131. The cubic root of 20394297 is about 273.2139770707.

It can be divided in two parts, 2039 and 4297, that added together give a palindrome (6336).

The spelling of 20394297 in words is "twenty million, three hundred ninety-four thousand, two hundred ninety-seven".