20490201 has 12 divisors (see below), whose sum is σ = 30319380. Its totient is φ = 13326720.

The previous prime is 20490199. The next prime is 20490229. The reversal of 20490201 is 10209402.

It can be written as a sum of positive squares in 2 ways, for example, as 455625 + 20034576 = 675^2 + 4476^2 .

It is not a de Polignac number, because 20490201 - 2¹ = 20490199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20490251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27396 + ... + 28133.

It is an arithmetic number, because the mean of its divisors is an integer number (2526615).

Almost surely, 2^20490201 is an apocalyptic number.

It is an amenable number.

20490201 is a deficient number, since it is larger than the sum of its proper divisors (9829179).

20490201 is a wasteful number, since it uses less digits than its factorization.

20490201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55576 (or 55573 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20490201 is about 4526.6103212006. The cubic root of 20490201 is about 273.6415696174.

Adding to 20490201 its reverse (10209402), we get a palindrome (30699603).

The spelling of 20490201 in words is "twenty million, four hundred ninety thousand, two hundred one".