20125641 has 8 divisors (see below), whose sum is σ = 26873280. Its totient is φ = 13397552.

The previous prime is 20125631. The next prime is 20125649. The reversal of 20125641 is 14652102.

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 20125641 - 2⁷ = 20125513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20125649) 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 7 ways as a sum of consecutive naturals, for example, 2286 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (3359160).

Almost surely, 2^20125641 is an apocalyptic number.

It is an amenable number.

20125641 is a deficient number, since it is larger than the sum of its proper divisors (6747639).

20125641 is an equidigital number, since it uses as much as digits as its factorization.

20125641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9775.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20125641 is about 4486.1610537296. The cubic root of 20125641 is about 272.0089791226.

Adding to 20125641 its reverse (14652102), we get a palindrome (34777743).

The spelling of 20125641 in words is "twenty million, one hundred twenty-five thousand, six hundred forty-one".