20137297 has 8 divisors (see below), whose sum is σ = 20734056. Its totient is φ = 19548672.

The previous prime is 20137289. The next prime is 20137301. The reversal of 20137297 is 79273102.

It can be written as a sum of positive squares in 4 ways, for example, as 7349521 + 12787776 = 2711^2 + 3576^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20137297 - 2³ = 20137289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20137217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3183 + ... + 7099.

It is an arithmetic number, because the mean of its divisors is an integer number (2591757).

Almost surely, 2^20137297 is an apocalyptic number.

It is an amenable number.

20137297 is a deficient number, since it is larger than the sum of its proper divisors (596759).

20137297 is an equidigital number, since it uses as much as digits as its factorization.

20137297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 20137297 is about 4487.4599719663. The cubic root of 20137297 is about 272.0614813803.

The spelling of 20137297 in words is "twenty million, one hundred thirty-seven thousand, two hundred ninety-seven".