20140245 has 30 divisors (see below), whose sum is σ = 36265878. Its totient is φ = 10693296.

The previous prime is 20140243. The next prime is 20140271. The reversal of 20140245 is 54204102.

It can be written as a sum of positive squares in only one way, i.e., 16112196 + 4028049 = 4014^2 + 2007^2 .

It is not a de Polignac number, because 20140245 - 2¹ = 20140243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20140243) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 90204 + ... + 90426.

Almost surely, 2^20140245 is an apocalyptic number.

It is an amenable number.

20140245 is a deficient number, since it is larger than the sum of its proper divisors (16125633).

20140245 is an frugal number, since it uses more digits than its factorization.

20140245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20140245 is about 4487.7884308421. The cubic root of 20140245 is about 272.0747568812.

Multiplying 20140245 by its product of nonzero digits (320), we get a square (6444878400 = 80280²).

Adding to 20140245 its reverse (54204102), we get a palindrome (74344347).

The spelling of 20140245 in words is "twenty million, one hundred forty thousand, two hundred forty-five".