20264641 has 8 divisors (see below), whose sum is σ = 20868840. Its totient is φ = 19663488.

The previous prime is 20264609. The next prime is 20264689. The reversal of 20264641 is 14646202.

It can be written as a sum of positive squares in 4 ways, for example, as 17472400 + 2792241 = 4180^2 + 1671^2 .

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 20264641 - 2⁵ = 20264609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20264141) 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, 24645 + ... + 25453.

It is an arithmetic number, because the mean of its divisors is an integer number (2608605).

Almost surely, 2^20264641 is an apocalyptic number.

It is an amenable number.

20264641 is a deficient number, since it is larger than the sum of its proper divisors (604199).

20264641 is an equidigital number, since it uses as much as digits as its factorization.

20264641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20264641 is about 4501.6264838389. The cubic root of 20264641 is about 272.6337631307.

The spelling of 20264641 in words is "twenty million, two hundred sixty-four thousand, six hundred forty-one".