20255641 has 8 divisors (see below), whose sum is σ = 23495360. Its totient is φ = 17102448.

The previous prime is 20255639. The next prime is 20255647. The reversal of 20255641 is 14655202.

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 20255641 - 2¹ = 20255639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20255647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21126 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (2936920).

Almost surely, 2^20255641 is an apocalyptic number.

It is an amenable number.

20255641 is a deficient number, since it is larger than the sum of its proper divisors (3239719).

20255641 is an equidigital number, since it uses as much as digits as its factorization.

20255641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43263.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20255641 is about 4500.6267341338. The cubic root of 20255641 is about 272.5933961485.

The spelling of 20255641 in words is "twenty million, two hundred fifty-five thousand, six hundred forty-one".