20425201 has 4 divisors (see below), whose sum is σ = 20434804. Its totient is φ = 20415600.

The previous prime is 20425189. The next prime is 20425217. The reversal of 20425201 is 10252402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 17098225 = 1824^2 + 4135^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425201 - 2⁵ = 20425169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20425231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30 + ... + 6391.

It is an arithmetic number, because the mean of its divisors is an integer number (5108701).

Almost surely, 2^20425201 is an apocalyptic number.

It is an amenable number.

20425201 is a deficient number, since it is larger than the sum of its proper divisors (9603).

20425201 is an equidigital number, since it uses as much as digits as its factorization.

20425201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9602.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20425201 is about 4519.4248527882. The cubic root of 20425201 is about 273.3519101328.

Adding to 20425201 its reverse (10252402), we get a palindrome (30677603).

The spelling of 20425201 in words is "twenty million, four hundred twenty-five thousand, two hundred one".