20261473 has 8 divisors (see below), whose sum is σ = 20593440. Its totient is φ = 19932000.

The previous prime is 20261431. The next prime is 20261497. The reversal of 20261473 is 37416202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20261473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20261173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21886 + ... + 22792.

It is an arithmetic number, because the mean of its divisors is an integer number (2574180).

Almost surely, 2^20261473 is an apocalyptic number.

It is an amenable number.

20261473 is a deficient number, since it is larger than the sum of its proper divisors (331967).

20261473 is an equidigital number, since it uses as much as digits as its factorization.

20261473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20261473 is about 4501.2745972669. The cubic root of 20261473 is about 272.6195553163.

Adding to 20261473 its reverse (37416202), we get a palindrome (57677675).

The spelling of 20261473 in words is "twenty million, two hundred sixty-one thousand, four hundred seventy-three".